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Finding the Fourth Proportional to 724.61, 1,085.16 and 463.81

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Solution

The fourth proportional to 724.61, 1,085.16 and 463.81 is: 694.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.61 : 1,085.16 = 463.81 : x
  2. Step 2: Convert to fraction form
    724.61/1,085.16 = 463.81/x
  3. Step 3: Cross multiply
    724.61x = 1,085.16 × 463.81
  4. Step 4: Simplify right side
    724.61x = 503,308.06
  5. Step 5: Solve for x
    x = 503,308.06/724.61
  6. Step 6: Final answer
    x = 694.59

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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.