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Finding the Fourth Proportional to 2,915.32, 4,372.92 and 724.06

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Solution

The fourth proportional to 2,915.32, 4,372.92 and 724.06 is: 1,086.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.32 : 4,372.92 = 724.06 : x
  2. Step 2: Convert to fraction form
    2,915.32/4,372.92 = 724.06/x
  3. Step 3: Cross multiply
    2,915.32x = 4,372.92 × 724.06
  4. Step 4: Simplify right side
    2,915.32x = 3,166,256.46
  5. Step 5: Solve for x
    x = 3,166,256.46/2,915.32
  6. Step 6: Final answer
    x = 1,086.08

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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.