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Finding the Fourth Proportional to 726.42, 1,001.34 and 578.82

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Solution

The fourth proportional to 726.42, 1,001.34 and 578.82 is: 797.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.42 : 1,001.34 = 578.82 : x
  2. Step 2: Convert to fraction form
    726.42/1,001.34 = 578.82/x
  3. Step 3: Cross multiply
    726.42x = 1,001.34 × 578.82
  4. Step 4: Simplify right side
    726.42x = 579,595.62
  5. Step 5: Solve for x
    x = 579,595.62/726.42
  6. Step 6: Final answer
    x = 797.88

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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.