Home / 512,491,246.40-768,736,869.60-426,326,945.60

Finding the Fourth Proportional to 512,491,246.40, 768,736,869.60 and 426,326,945.60

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Solution

The fourth proportional to 512,491,246.40, 768,736,869.60 and 426,326,945.60 is: 639,490,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,491,246.40 : 768,736,869.60 = 426,326,945.60 : x
  2. Step 2: Convert to fraction form
    512,491,246.40/768,736,869.60 = 426,326,945.60/x
  3. Step 3: Cross multiply
    512,491,246.40x = 768,736,869.60 × 426,326,945.60
  4. Step 4: Simplify right side
    512,491,246.40x = 327,733,241,586,673,536
  5. Step 5: Solve for x
    x = 327,733,241,586,673,536/512,491,246.40
  6. Step 6: Final answer
    x = 639,490,418.40

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.