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Finding the Fourth Proportional to 724.47, 1,085.87 and 333.65

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Solution

The fourth proportional to 724.47, 1,085.87 and 333.65 is: 500.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.47 : 1,085.87 = 333.65 : x
  2. Step 2: Convert to fraction form
    724.47/1,085.87 = 333.65/x
  3. Step 3: Cross multiply
    724.47x = 1,085.87 × 333.65
  4. Step 4: Simplify right side
    724.47x = 362,302.20
  5. Step 5: Solve for x
    x = 362,302.20/724.47
  6. Step 6: Final answer
    x = 500.09

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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.