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Finding the Fourth Proportional to 398.10, 549.35 and 232.31

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Solution

The fourth proportional to 398.10, 549.35 and 232.31 is: 320.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.10 : 549.35 = 232.31 : x
  2. Step 2: Convert to fraction form
    398.10/549.35 = 232.31/x
  3. Step 3: Cross multiply
    398.10x = 549.35 × 232.31
  4. Step 4: Simplify right side
    398.10x = 127,620.58
  5. Step 5: Solve for x
    x = 127,620.58/398.10
  6. Step 6: Final answer
    x = 320.57

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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.