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Finding the Fourth Proportional to 2,301.78, 3,452.65 and 915.43

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Solution

The fourth proportional to 2,301.78, 3,452.65 and 915.43 is: 1,373.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,301.78 : 3,452.65 = 915.43 : x
  2. Step 2: Convert to fraction form
    2,301.78/3,452.65 = 915.43/x
  3. Step 3: Cross multiply
    2,301.78x = 3,452.65 × 915.43
  4. Step 4: Simplify right side
    2,301.78x = 3,160,659.39
  5. Step 5: Solve for x
    x = 3,160,659.39/2,301.78
  6. Step 6: Final answer
    x = 1,373.14

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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.