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Finding the Fourth Proportional to 915.83, 1,375.12 and 902.17

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Solution

The fourth proportional to 915.83, 1,375.12 and 902.17 is: 1,354.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.83 : 1,375.12 = 902.17 : x
  2. Step 2: Convert to fraction form
    915.83/1,375.12 = 902.17/x
  3. Step 3: Cross multiply
    915.83x = 1,375.12 × 902.17
  4. Step 4: Simplify right side
    915.83x = 1,240,580.62
  5. Step 5: Solve for x
    x = 1,240,580.62/915.83
  6. Step 6: Final answer
    x = 1,354.60

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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.