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Finding the Fourth Proportional to 773.68, 1,065.90 and 732.64

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Solution

The fourth proportional to 773.68, 1,065.90 and 732.64 is: 1,009.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.68 : 1,065.90 = 732.64 : x
  2. Step 2: Convert to fraction form
    773.68/1,065.90 = 732.64/x
  3. Step 3: Cross multiply
    773.68x = 1,065.90 × 732.64
  4. Step 4: Simplify right side
    773.68x = 780,920.98
  5. Step 5: Solve for x
    x = 780,920.98/773.68
  6. Step 6: Final answer
    x = 1,009.36

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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.