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Finding the Fourth Proportional to 354.40, 488.80 and 229.92

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Solution

The fourth proportional to 354.40, 488.80 and 229.92 is: 317.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.40 : 488.80 = 229.92 : x
  2. Step 2: Convert to fraction form
    354.40/488.80 = 229.92/x
  3. Step 3: Cross multiply
    354.40x = 488.80 × 229.92
  4. Step 4: Simplify right side
    354.40x = 112,384.90
  5. Step 5: Solve for x
    x = 112,384.90/354.40
  6. Step 6: Final answer
    x = 317.11

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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.