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Finding the Fourth Proportional to 725.60, 1,001.33 and 430.89

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Solution

The fourth proportional to 725.60, 1,001.33 and 430.89 is: 594.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.60 : 1,001.33 = 430.89 : x
  2. Step 2: Convert to fraction form
    725.60/1,001.33 = 430.89/x
  3. Step 3: Cross multiply
    725.60x = 1,001.33 × 430.89
  4. Step 4: Simplify right side
    725.60x = 431,455.92
  5. Step 5: Solve for x
    x = 431,455.92/725.60
  6. Step 6: Final answer
    x = 594.62

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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.