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Finding the Fourth Proportional to 908.20, 1,359.06 and 726.76

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Solution

The fourth proportional to 908.20, 1,359.06 and 726.76 is: 1,087.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.20 : 1,359.06 = 726.76 : x
  2. Step 2: Convert to fraction form
    908.20/1,359.06 = 726.76/x
  3. Step 3: Cross multiply
    908.20x = 1,359.06 × 726.76
  4. Step 4: Simplify right side
    908.20x = 987,710.45
  5. Step 5: Solve for x
    x = 987,710.45/908.20
  6. Step 6: Final answer
    x = 1,087.55

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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.