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Finding the Fourth Proportional to 752.96, 1,129.84 and 479.18

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Solution

The fourth proportional to 752.96, 1,129.84 and 479.18 is: 719.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.96 : 1,129.84 = 479.18 : x
  2. Step 2: Convert to fraction form
    752.96/1,129.84 = 479.18/x
  3. Step 3: Cross multiply
    752.96x = 1,129.84 × 479.18
  4. Step 4: Simplify right side
    752.96x = 541,396.73
  5. Step 5: Solve for x
    x = 541,396.73/752.96
  6. Step 6: Final answer
    x = 719.02

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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.