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Finding the Fourth Proportional to 724.57, 1,086.86 and 237.66

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Solution

The fourth proportional to 724.57, 1,086.86 and 237.66 is: 356.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.57 : 1,086.86 = 237.66 : x
  2. Step 2: Convert to fraction form
    724.57/1,086.86 = 237.66/x
  3. Step 3: Cross multiply
    724.57x = 1,086.86 × 237.66
  4. Step 4: Simplify right side
    724.57x = 258,303.15
  5. Step 5: Solve for x
    x = 258,303.15/724.57
  6. Step 6: Final answer
    x = 356.49

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Half scale
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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.