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Finding the Fourth Proportional to 424,345.19, 636,821.80 and 154,472.76

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Solution

The fourth proportional to 424,345.19, 636,821.80 and 154,472.76 is: 231,819.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,345.19 : 636,821.80 = 154,472.76 : x
  2. Step 2: Convert to fraction form
    424,345.19/636,821.80 = 154,472.76/x
  3. Step 3: Cross multiply
    424,345.19x = 636,821.80 × 154,472.76
  4. Step 4: Simplify right side
    424,345.19x = 98,371,621,074.17
  5. Step 5: Solve for x
    x = 98,371,621,074.17/424,345.19
  6. Step 6: Final answer
    x = 231,819.81

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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.