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Finding the Fourth Proportional to 489.95, 676.03 and 342.53

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Solution

The fourth proportional to 489.95, 676.03 and 342.53 is: 472.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.95 : 676.03 = 342.53 : x
  2. Step 2: Convert to fraction form
    489.95/676.03 = 342.53/x
  3. Step 3: Cross multiply
    489.95x = 676.03 × 342.53
  4. Step 4: Simplify right side
    489.95x = 231,560.56
  5. Step 5: Solve for x
    x = 231,560.56/489.95
  6. Step 6: Final answer
    x = 472.62

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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.