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Finding the Fourth Proportional to 291.62, 402 and 229.31

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Solution

The fourth proportional to 291.62, 402 and 229.31 is: 316.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.62 : 402 = 229.31 : x
  2. Step 2: Convert to fraction form
    291.62/402 = 229.31/x
  3. Step 3: Cross multiply
    291.62x = 402 × 229.31
  4. Step 4: Simplify right side
    291.62x = 92,182.62
  5. Step 5: Solve for x
    x = 92,182.62/291.62
  6. Step 6: Final answer
    x = 316.11

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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.