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Finding the Fourth Proportional to 748.20, 1,030.98 and 527.40

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Solution

The fourth proportional to 748.20, 1,030.98 and 527.40 is: 726.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.20 : 1,030.98 = 527.40 : x
  2. Step 2: Convert to fraction form
    748.20/1,030.98 = 527.40/x
  3. Step 3: Cross multiply
    748.20x = 1,030.98 × 527.40
  4. Step 4: Simplify right side
    748.20x = 543,738.85
  5. Step 5: Solve for x
    x = 543,738.85/748.20
  6. Step 6: Final answer
    x = 726.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.