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Finding the Fourth Proportional to 701.67, 1,052.78 and 520.59

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Solution

The fourth proportional to 701.67, 1,052.78 and 520.59 is: 781.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.67 : 1,052.78 = 520.59 : x
  2. Step 2: Convert to fraction form
    701.67/1,052.78 = 520.59/x
  3. Step 3: Cross multiply
    701.67x = 1,052.78 × 520.59
  4. Step 4: Simplify right side
    701.67x = 548,064.14
  5. Step 5: Solve for x
    x = 548,064.14/701.67
  6. Step 6: Final answer
    x = 781.09

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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.