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Finding the Fourth Proportional to 2,475.68, 3,712.36 and 915.28

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Solution

The fourth proportional to 2,475.68, 3,712.36 and 915.28 is: 1,372.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,475.68 : 3,712.36 = 915.28 : x
  2. Step 2: Convert to fraction form
    2,475.68/3,712.36 = 915.28/x
  3. Step 3: Cross multiply
    2,475.68x = 3,712.36 × 915.28
  4. Step 4: Simplify right side
    2,475.68x = 3,397,848.86
  5. Step 5: Solve for x
    x = 3,397,848.86/2,475.68
  6. Step 6: Final answer
    x = 1,372.49

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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.