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Finding the Fourth Proportional to 863.61, 1,192.49 and 704.12

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Solution

The fourth proportional to 863.61, 1,192.49 and 704.12 is: 972.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.61 : 1,192.49 = 704.12 : x
  2. Step 2: Convert to fraction form
    863.61/1,192.49 = 704.12/x
  3. Step 3: Cross multiply
    863.61x = 1,192.49 × 704.12
  4. Step 4: Simplify right side
    863.61x = 839,655.52
  5. Step 5: Solve for x
    x = 839,655.52/863.61
  6. Step 6: Final answer
    x = 972.26

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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.