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Finding the Fourth Proportional to 701.20, 1,050.42 and 426.61

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Solution

The fourth proportional to 701.20, 1,050.42 and 426.61 is: 639.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.20 : 1,050.42 = 426.61 : x
  2. Step 2: Convert to fraction form
    701.20/1,050.42 = 426.61/x
  3. Step 3: Cross multiply
    701.20x = 1,050.42 × 426.61
  4. Step 4: Simplify right side
    701.20x = 448,114.42
  5. Step 5: Solve for x
    x = 448,114.42/701.20
  6. Step 6: Final answer
    x = 639.07

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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.