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Finding the Fourth Proportional to 915.13, 1,374.52 and 750.89

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Solution

The fourth proportional to 915.13, 1,374.52 and 750.89 is: 1,127.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.13 : 1,374.52 = 750.89 : x
  2. Step 2: Convert to fraction form
    915.13/1,374.52 = 750.89/x
  3. Step 3: Cross multiply
    915.13x = 1,374.52 × 750.89
  4. Step 4: Simplify right side
    915.13x = 1,032,108.56
  5. Step 5: Solve for x
    x = 1,032,108.56/915.13
  6. Step 6: Final answer
    x = 1,127.83

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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.