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Finding the Fourth Proportional to 748.36, 1,120.92 and 503.80

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Solution

The fourth proportional to 748.36, 1,120.92 and 503.80 is: 754.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.36 : 1,120.92 = 503.80 : x
  2. Step 2: Convert to fraction form
    748.36/1,120.92 = 503.80/x
  3. Step 3: Cross multiply
    748.36x = 1,120.92 × 503.80
  4. Step 4: Simplify right side
    748.36x = 564,719.50
  5. Step 5: Solve for x
    x = 564,719.50/748.36
  6. Step 6: Final answer
    x = 754.61

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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.