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Finding the Fourth Proportional to 725.72, 1,001.43 and 431.01

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Solution

The fourth proportional to 725.72, 1,001.43 and 431.01 is: 594.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.72 : 1,001.43 = 431.01 : x
  2. Step 2: Convert to fraction form
    725.72/1,001.43 = 431.01/x
  3. Step 3: Cross multiply
    725.72x = 1,001.43 × 431.01
  4. Step 4: Simplify right side
    725.72x = 431,626.34
  5. Step 5: Solve for x
    x = 431,626.34/725.72
  6. Step 6: Final answer
    x = 594.76

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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.