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Finding the Fourth Proportional to 2,474.80, 3,712.45 and 915.22

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Solution

The fourth proportional to 2,474.80, 3,712.45 and 915.22 is: 1,372.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,474.80 : 3,712.45 = 915.22 : x
  2. Step 2: Convert to fraction form
    2,474.80/3,712.45 = 915.22/x
  3. Step 3: Cross multiply
    2,474.80x = 3,712.45 × 915.22
  4. Step 4: Simplify right side
    2,474.80x = 3,397,708.49
  5. Step 5: Solve for x
    x = 3,397,708.49/2,474.80
  6. Step 6: Final answer
    x = 1,372.92

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1.5x scale

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.