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Finding the Fourth Proportional to 971.84, 1,343.04 and 863.84

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Solution

The fourth proportional to 971.84, 1,343.04 and 863.84 is: 1,193.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.84 : 1,343.04 = 863.84 : x
  2. Step 2: Convert to fraction form
    971.84/1,343.04 = 863.84/x
  3. Step 3: Cross multiply
    971.84x = 1,343.04 × 863.84
  4. Step 4: Simplify right side
    971.84x = 1,160,171.67
  5. Step 5: Solve for x
    x = 1,160,171.67/971.84
  6. Step 6: Final answer
    x = 1,193.79

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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.