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Finding the Fourth Proportional to 554,151.78, 764,714.18 and 312,432.26

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Solution

The fourth proportional to 554,151.78, 764,714.18 and 312,432.26 is: 431,147.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,151.78 : 764,714.18 = 312,432.26 : x
  2. Step 2: Convert to fraction form
    554,151.78/764,714.18 = 312,432.26/x
  3. Step 3: Cross multiply
    554,151.78x = 764,714.18 × 312,432.26
  4. Step 4: Simplify right side
    554,151.78x = 238,921,376,468.96
  5. Step 5: Solve for x
    x = 238,921,376,468.96/554,151.78
  6. Step 6: Final answer
    x = 431,147.90

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.