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Finding the Fourth Proportional to 424,456.83, 636,707.93 and 108,916.47

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Solution

The fourth proportional to 424,456.83, 636,707.93 and 108,916.47 is: 163,380.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,456.83 : 636,707.93 = 108,916.47 : x
  2. Step 2: Convert to fraction form
    424,456.83/636,707.93 = 108,916.47/x
  3. Step 3: Cross multiply
    424,456.83x = 636,707.93 × 108,916.47
  4. Step 4: Simplify right side
    424,456.83x = 69,347,979,612.02
  5. Step 5: Solve for x
    x = 69,347,979,612.02/424,456.83
  6. Step 6: Final answer
    x = 163,380.52

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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.