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Finding the Fourth Proportional to 2,475.87, 3,711.69 and 915.58

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Solution

The fourth proportional to 2,475.87, 3,711.69 and 915.58 is: 1,372.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,475.87 : 3,711.69 = 915.58 : x
  2. Step 2: Convert to fraction form
    2,475.87/3,711.69 = 915.58/x
  3. Step 3: Cross multiply
    2,475.87x = 3,711.69 × 915.58
  4. Step 4: Simplify right side
    2,475.87x = 3,398,358.99
  5. Step 5: Solve for x
    x = 3,398,358.99/2,475.87
  6. Step 6: Final answer
    x = 1,372.59

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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.