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Finding the Fourth Proportional to 466,646.61, 644,020.70 and 285,479.18

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Solution

The fourth proportional to 466,646.61, 644,020.70 and 285,479.18 is: 393,990.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    466,646.61 : 644,020.70 = 285,479.18 : x
  2. Step 2: Convert to fraction form
    466,646.61/644,020.70 = 285,479.18/x
  3. Step 3: Cross multiply
    466,646.61x = 644,020.70 × 285,479.18
  4. Step 4: Simplify right side
    466,646.61x = 183,854,496,691.53
  5. Step 5: Solve for x
    x = 183,854,496,691.53/466,646.61
  6. Step 6: Final answer
    x = 393,990.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.