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Finding the Fourth Proportional to 752.54, 1,130.18 and 691.56

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Solution

The fourth proportional to 752.54, 1,130.18 and 691.56 is: 1,038.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.54 : 1,130.18 = 691.56 : x
  2. Step 2: Convert to fraction form
    752.54/1,130.18 = 691.56/x
  3. Step 3: Cross multiply
    752.54x = 1,130.18 × 691.56
  4. Step 4: Simplify right side
    752.54x = 781,583.82
  5. Step 5: Solve for x
    x = 781,583.82/752.54
  6. Step 6: Final answer
    x = 1,038.60

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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.