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Finding the Fourth Proportional to 761.90, 1,134.98 and 726.66

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Solution

The fourth proportional to 761.90, 1,134.98 and 726.66 is: 1,082.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.90 : 1,134.98 = 726.66 : x
  2. Step 2: Convert to fraction form
    761.90/1,134.98 = 726.66/x
  3. Step 3: Cross multiply
    761.90x = 1,134.98 × 726.66
  4. Step 4: Simplify right side
    761.90x = 824,740.93
  5. Step 5: Solve for x
    x = 824,740.93/761.90
  6. Step 6: Final answer
    x = 1,082.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.