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Finding the Fourth Proportional to 756.46, 1,042.36 and 520.48

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Solution

The fourth proportional to 756.46, 1,042.36 and 520.48 is: 717.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.46 : 1,042.36 = 520.48 : x
  2. Step 2: Convert to fraction form
    756.46/1,042.36 = 520.48/x
  3. Step 3: Cross multiply
    756.46x = 1,042.36 × 520.48
  4. Step 4: Simplify right side
    756.46x = 542,527.53
  5. Step 5: Solve for x
    x = 542,527.53/756.46
  6. Step 6: Final answer
    x = 717.19

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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.