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Finding the Fourth Proportional to 397.04, 547.98 and 231.28

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Solution

The fourth proportional to 397.04, 547.98 and 231.28 is: 319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.04 : 547.98 = 231.28 : x
  2. Step 2: Convert to fraction form
    397.04/547.98 = 231.28/x
  3. Step 3: Cross multiply
    397.04x = 547.98 × 231.28
  4. Step 4: Simplify right side
    397.04x = 126,736.81
  5. Step 5: Solve for x
    x = 126,736.81/397.04
  6. Step 6: Final answer
    x = 319.20

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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.