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Finding the Fourth Proportional to 752.66, 1,039.29 and 520.46

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Solution

The fourth proportional to 752.66, 1,039.29 and 520.46 is: 718.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.66 : 1,039.29 = 520.46 : x
  2. Step 2: Convert to fraction form
    752.66/1,039.29 = 520.46/x
  3. Step 3: Cross multiply
    752.66x = 1,039.29 × 520.46
  4. Step 4: Simplify right side
    752.66x = 540,908.87
  5. Step 5: Solve for x
    x = 540,908.87/752.66
  6. Step 6: Final answer
    x = 718.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.