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Finding the Fourth Proportional to 576,139.80, 864,209.70 and 339,943.80

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Solution

The fourth proportional to 576,139.80, 864,209.70 and 339,943.80 is: 509,915.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,139.80 : 864,209.70 = 339,943.80 : x
  2. Step 2: Convert to fraction form
    576,139.80/864,209.70 = 339,943.80/x
  3. Step 3: Cross multiply
    576,139.80x = 864,209.70 × 339,943.80
  4. Step 4: Simplify right side
    576,139.80x = 293,782,729,414.86
  5. Step 5: Solve for x
    x = 293,782,729,414.86/576,139.80
  6. Step 6: Final answer
    x = 509,915.70

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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.