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Finding the Fourth Proportional to 847.64, 1,169.32 and 731

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Solution

The fourth proportional to 847.64, 1,169.32 and 731 is: 1,008.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.64 : 1,169.32 = 731 : x
  2. Step 2: Convert to fraction form
    847.64/1,169.32 = 731/x
  3. Step 3: Cross multiply
    847.64x = 1,169.32 × 731
  4. Step 4: Simplify right side
    847.64x = 854,772.92
  5. Step 5: Solve for x
    x = 854,772.92/847.64
  6. Step 6: Final answer
    x = 1,008.42

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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.