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Finding the Fourth Proportional to 485,978.73, 728,377.10 and 343,864.96

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Solution

The fourth proportional to 485,978.73, 728,377.10 and 343,864.96 is: 515,379.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,978.73 : 728,377.10 = 343,864.96 : x
  2. Step 2: Convert to fraction form
    485,978.73/728,377.10 = 343,864.96/x
  3. Step 3: Cross multiply
    485,978.73x = 728,377.10 × 343,864.96
  4. Step 4: Simplify right side
    485,978.73x = 250,463,358,714.53
  5. Step 5: Solve for x
    x = 250,463,358,714.53/485,978.73
  6. Step 6: Final answer
    x = 515,379.26

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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.