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Finding the Fourth Proportional to 424,162.17, 636,226.65 and 143,679.42

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Solution

The fourth proportional to 424,162.17, 636,226.65 and 143,679.42 is: 215,513.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,162.17 : 636,226.65 = 143,679.42 : x
  2. Step 2: Convert to fraction form
    424,162.17/636,226.65 = 143,679.42/x
  3. Step 3: Cross multiply
    424,162.17x = 636,226.65 × 143,679.42
  4. Step 4: Simplify right side
    424,162.17x = 91,412,676,060.54
  5. Step 5: Solve for x
    x = 91,412,676,060.54/424,162.17
  6. Step 6: Final answer
    x = 215,513.51

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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.