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Finding the Fourth Proportional to 725.33, 1,001.61 and 463.79

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Solution

The fourth proportional to 725.33, 1,001.61 and 463.79 is: 640.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.33 : 1,001.61 = 463.79 : x
  2. Step 2: Convert to fraction form
    725.33/1,001.61 = 463.79/x
  3. Step 3: Cross multiply
    725.33x = 1,001.61 × 463.79
  4. Step 4: Simplify right side
    725.33x = 464,539.21
  5. Step 5: Solve for x
    x = 464,539.21/725.33
  6. Step 6: Final answer
    x = 640.45

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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.