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Finding the Fourth Proportional to 752.84, 1,129.08 and 239.84

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Solution

The fourth proportional to 752.84, 1,129.08 and 239.84 is: 359.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.84 : 1,129.08 = 239.84 : x
  2. Step 2: Convert to fraction form
    752.84/1,129.08 = 239.84/x
  3. Step 3: Cross multiply
    752.84x = 1,129.08 × 239.84
  4. Step 4: Simplify right side
    752.84x = 270,798.55
  5. Step 5: Solve for x
    x = 270,798.55/752.84
  6. Step 6: Final answer
    x = 359.70

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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.