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Finding the Fourth Proportional to 726.70, 1,090.02 and 315.82

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Solution

The fourth proportional to 726.70, 1,090.02 and 315.82 is: 473.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.70 : 1,090.02 = 315.82 : x
  2. Step 2: Convert to fraction form
    726.70/1,090.02 = 315.82/x
  3. Step 3: Cross multiply
    726.70x = 1,090.02 × 315.82
  4. Step 4: Simplify right side
    726.70x = 344,250.12
  5. Step 5: Solve for x
    x = 344,250.12/726.70
  6. Step 6: Final answer
    x = 473.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.