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Finding the Fourth Proportional to 867.60, 1,198.29 and 574.20

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Solution

The fourth proportional to 867.60, 1,198.29 and 574.20 is: 793.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.60 : 1,198.29 = 574.20 : x
  2. Step 2: Convert to fraction form
    867.60/1,198.29 = 574.20/x
  3. Step 3: Cross multiply
    867.60x = 1,198.29 × 574.20
  4. Step 4: Simplify right side
    867.60x = 688,058.12
  5. Step 5: Solve for x
    x = 688,058.12/867.60
  6. Step 6: Final answer
    x = 793.06

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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.