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Finding the Fourth Proportional to 725.14, 1,000.65 and 426.35

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Solution

The fourth proportional to 725.14, 1,000.65 and 426.35 is: 588.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.14 : 1,000.65 = 426.35 : x
  2. Step 2: Convert to fraction form
    725.14/1,000.65 = 426.35/x
  3. Step 3: Cross multiply
    725.14x = 1,000.65 × 426.35
  4. Step 4: Simplify right side
    725.14x = 426,622.12
  5. Step 5: Solve for x
    x = 426,622.12/725.14
  6. Step 6: Final answer
    x = 588.33

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1.5x scale

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.