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Finding the Fourth Proportional to 621.90, 932.85 and 605.66

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Solution

The fourth proportional to 621.90, 932.85 and 605.66 is: 908.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.90 : 932.85 = 605.66 : x
  2. Step 2: Convert to fraction form
    621.90/932.85 = 605.66/x
  3. Step 3: Cross multiply
    621.90x = 932.85 × 605.66
  4. Step 4: Simplify right side
    621.90x = 564,989.93
  5. Step 5: Solve for x
    x = 564,989.93/621.90
  6. Step 6: Final answer
    x = 908.49

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Double scale
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Similar ratio
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1.5x scale

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.