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Finding the Fourth Proportional to 752.35, 1,128.31 and 265.33

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Solution

The fourth proportional to 752.35, 1,128.31 and 265.33 is: 397.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.35 : 1,128.31 = 265.33 : x
  2. Step 2: Convert to fraction form
    752.35/1,128.31 = 265.33/x
  3. Step 3: Cross multiply
    752.35x = 1,128.31 × 265.33
  4. Step 4: Simplify right side
    752.35x = 299,374.49
  5. Step 5: Solve for x
    x = 299,374.49/752.35
  6. Step 6: Final answer
    x = 397.92

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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.