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Finding the Fourth Proportional to 424,488.50, 636,732.74 and 108,945.40

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Solution

The fourth proportional to 424,488.50, 636,732.74 and 108,945.40 is: 163,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,488.50 : 636,732.74 = 108,945.40 : x
  2. Step 2: Convert to fraction form
    424,488.50/636,732.74 = 108,945.40/x
  3. Step 3: Cross multiply
    424,488.50x = 636,732.74 × 108,945.40
  4. Step 4: Simplify right side
    424,488.50x = 69,369,103,052.40
  5. Step 5: Solve for x
    x = 69,369,103,052.40/424,488.50
  6. Step 6: Final answer
    x = 163,418.10

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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.