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Finding the Fourth Proportional to 424,409.85, 636,614.98 and 108,866.86

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Solution

The fourth proportional to 424,409.85, 636,614.98 and 108,866.86 is: 163,300.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,409.85 : 636,614.98 = 108,866.86 : x
  2. Step 2: Convert to fraction form
    424,409.85/636,614.98 = 108,866.86/x
  3. Step 3: Cross multiply
    424,409.85x = 636,614.98 × 108,866.86
  4. Step 4: Simplify right side
    424,409.85x = 69,306,272,037.86
  5. Step 5: Solve for x
    x = 69,306,272,037.86/424,409.85
  6. Step 6: Final answer
    x = 163,300.34

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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.