Home / 811,293.20-1,216,939.80-512,111.60

Finding the Fourth Proportional to 811,293.20, 1,216,939.80 and 512,111.60

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Solution

The fourth proportional to 811,293.20, 1,216,939.80 and 512,111.60 is: 768,167.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,293.20 : 1,216,939.80 = 512,111.60 : x
  2. Step 2: Convert to fraction form
    811,293.20/1,216,939.80 = 512,111.60/x
  3. Step 3: Cross multiply
    811,293.20x = 1,216,939.80 × 512,111.60
  4. Step 4: Simplify right side
    811,293.20x = 623,208,988,081.68
  5. Step 5: Solve for x
    x = 623,208,988,081.68/811,293.20
  6. Step 6: Final answer
    x = 768,167.40

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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.