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Finding the Fourth Proportional to 418,988.71, 628,545.59 and 194,371.85

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Solution

The fourth proportional to 418,988.71, 628,545.59 and 194,371.85 is: 291,586.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,988.71 : 628,545.59 = 194,371.85 : x
  2. Step 2: Convert to fraction form
    418,988.71/628,545.59 = 194,371.85/x
  3. Step 3: Cross multiply
    418,988.71x = 628,545.59 × 194,371.85
  4. Step 4: Simplify right side
    418,988.71x = 122,171,569,137.64
  5. Step 5: Solve for x
    x = 122,171,569,137.64/418,988.71
  6. Step 6: Final answer
    x = 291,586.78

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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.