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Finding the Fourth Proportional to 726.21, 1,002.20 and 460.56

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Solution

The fourth proportional to 726.21, 1,002.20 and 460.56 is: 635.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.21 : 1,002.20 = 460.56 : x
  2. Step 2: Convert to fraction form
    726.21/1,002.20 = 460.56/x
  3. Step 3: Cross multiply
    726.21x = 1,002.20 × 460.56
  4. Step 4: Simplify right side
    726.21x = 461,573.23
  5. Step 5: Solve for x
    x = 461,573.23/726.21
  6. Step 6: Final answer
    x = 635.59

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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.