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Finding the Fourth Proportional to 750.52, 1,125.85 and 648.46

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Solution

The fourth proportional to 750.52, 1,125.85 and 648.46 is: 972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.52 : 1,125.85 = 648.46 : x
  2. Step 2: Convert to fraction form
    750.52/1,125.85 = 648.46/x
  3. Step 3: Cross multiply
    750.52x = 1,125.85 × 648.46
  4. Step 4: Simplify right side
    750.52x = 730,063.36
  5. Step 5: Solve for x
    x = 730,063.36/750.52
  6. Step 6: Final answer
    x = 972.75

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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.