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Finding the Fourth Proportional to 354.77, 489.41 and 230.45

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Solution

The fourth proportional to 354.77, 489.41 and 230.45 is: 317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.77 : 489.41 = 230.45 : x
  2. Step 2: Convert to fraction form
    354.77/489.41 = 230.45/x
  3. Step 3: Cross multiply
    354.77x = 489.41 × 230.45
  4. Step 4: Simplify right side
    354.77x = 112,780.94
  5. Step 5: Solve for x
    x = 112,780.94/354.77
  6. Step 6: Final answer
    x = 317.90

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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.