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Finding the Fourth Proportional to 488.31, 674.04 and 291.89

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Solution

The fourth proportional to 488.31, 674.04 and 291.89 is: 402.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.31 : 674.04 = 291.89 : x
  2. Step 2: Convert to fraction form
    488.31/674.04 = 291.89/x
  3. Step 3: Cross multiply
    488.31x = 674.04 × 291.89
  4. Step 4: Simplify right side
    488.31x = 196,742.17
  5. Step 5: Solve for x
    x = 196,742.17/488.31
  6. Step 6: Final answer
    x = 402.90

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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.