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Finding the Fourth Proportional to 489.30, 674.73 and 341.88

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Solution

The fourth proportional to 489.30, 674.73 and 341.88 is: 471.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.30 : 674.73 = 341.88 : x
  2. Step 2: Convert to fraction form
    489.30/674.73 = 341.88/x
  3. Step 3: Cross multiply
    489.30x = 674.73 × 341.88
  4. Step 4: Simplify right side
    489.30x = 230,676.69
  5. Step 5: Solve for x
    x = 230,676.69/489.30
  6. Step 6: Final answer
    x = 471.44

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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.