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Finding the Fourth Proportional to 867.16, 1,198.21 and 756.44

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Solution

The fourth proportional to 867.16, 1,198.21 and 756.44 is: 1,045.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.16 : 1,198.21 = 756.44 : x
  2. Step 2: Convert to fraction form
    867.16/1,198.21 = 756.44/x
  3. Step 3: Cross multiply
    867.16x = 1,198.21 × 756.44
  4. Step 4: Simplify right side
    867.16x = 906,373.97
  5. Step 5: Solve for x
    x = 906,373.97/867.16
  6. Step 6: Final answer
    x = 1,045.22

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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.