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Finding the Fourth Proportional to 701.81, 1,052.19 and 354.78

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Solution

The fourth proportional to 701.81, 1,052.19 and 354.78 is: 531.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.81 : 1,052.19 = 354.78 : x
  2. Step 2: Convert to fraction form
    701.81/1,052.19 = 354.78/x
  3. Step 3: Cross multiply
    701.81x = 1,052.19 × 354.78
  4. Step 4: Simplify right side
    701.81x = 373,295.97
  5. Step 5: Solve for x
    x = 373,295.97/701.81
  6. Step 6: Final answer
    x = 531.90

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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.