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Finding the Fourth Proportional to 610,057.20, 915,085.80 and 491,959.20

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Solution

The fourth proportional to 610,057.20, 915,085.80 and 491,959.20 is: 737,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,057.20 : 915,085.80 = 491,959.20 : x
  2. Step 2: Convert to fraction form
    610,057.20/915,085.80 = 491,959.20/x
  3. Step 3: Cross multiply
    610,057.20x = 915,085.80 × 491,959.20
  4. Step 4: Simplify right side
    610,057.20x = 450,184,878,099.36
  5. Step 5: Solve for x
    x = 450,184,878,099.36/610,057.20
  6. Step 6: Final answer
    x = 737,938.80

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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.