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Finding the Fourth Proportional to 724.08, 1,085.92 and 236.88

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Solution

The fourth proportional to 724.08, 1,085.92 and 236.88 is: 355.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.08 : 1,085.92 = 236.88 : x
  2. Step 2: Convert to fraction form
    724.08/1,085.92 = 236.88/x
  3. Step 3: Cross multiply
    724.08x = 1,085.92 × 236.88
  4. Step 4: Simplify right side
    724.08x = 257,232.73
  5. Step 5: Solve for x
    x = 257,232.73/724.08
  6. Step 6: Final answer
    x = 355.25

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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.