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Finding the Fourth Proportional to 763.88, 1,146.78 and 723.56

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Solution

The fourth proportional to 763.88, 1,146.78 and 723.56 is: 1,086.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.88 : 1,146.78 = 723.56 : x
  2. Step 2: Convert to fraction form
    763.88/1,146.78 = 723.56/x
  3. Step 3: Cross multiply
    763.88x = 1,146.78 × 723.56
  4. Step 4: Simplify right side
    763.88x = 829,764.14
  5. Step 5: Solve for x
    x = 829,764.14/763.88
  6. Step 6: Final answer
    x = 1,086.25

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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.