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Finding the Fourth Proportional to 447.47, 617.78 and 354.59

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Solution

The fourth proportional to 447.47, 617.78 and 354.59 is: 489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.47 : 617.78 = 354.59 : x
  2. Step 2: Convert to fraction form
    447.47/617.78 = 354.59/x
  3. Step 3: Cross multiply
    447.47x = 617.78 × 354.59
  4. Step 4: Simplify right side
    447.47x = 219,058.61
  5. Step 5: Solve for x
    x = 219,058.61/447.47
  6. Step 6: Final answer
    x = 489.55

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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.