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Finding the Fourth Proportional to 354.97, 489.88 and 230.70

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Solution

The fourth proportional to 354.97, 489.88 and 230.70 is: 318.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.97 : 489.88 = 230.70 : x
  2. Step 2: Convert to fraction form
    354.97/489.88 = 230.70/x
  3. Step 3: Cross multiply
    354.97x = 489.88 × 230.70
  4. Step 4: Simplify right side
    354.97x = 113,015.32
  5. Step 5: Solve for x
    x = 113,015.32/354.97
  6. Step 6: Final answer
    x = 318.38

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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.