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Finding the Fourth Proportional to 515,512.40, 773,268.60 and 507,639.20

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Solution

The fourth proportional to 515,512.40, 773,268.60 and 507,639.20 is: 761,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,512.40 : 773,268.60 = 507,639.20 : x
  2. Step 2: Convert to fraction form
    515,512.40/773,268.60 = 507,639.20/x
  3. Step 3: Cross multiply
    515,512.40x = 773,268.60 × 507,639.20
  4. Step 4: Simplify right side
    515,512.40x = 392,541,453,489.12
  5. Step 5: Solve for x
    x = 392,541,453,489.12/515,512.40
  6. Step 6: Final answer
    x = 761,458.80

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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.