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Finding the Fourth Proportional to 354.14, 488.53 and 243.68

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Solution

The fourth proportional to 354.14, 488.53 and 243.68 is: 336.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.14 : 488.53 = 243.68 : x
  2. Step 2: Convert to fraction form
    354.14/488.53 = 243.68/x
  3. Step 3: Cross multiply
    354.14x = 488.53 × 243.68
  4. Step 4: Simplify right side
    354.14x = 119,042.85
  5. Step 5: Solve for x
    x = 119,042.85/354.14
  6. Step 6: Final answer
    x = 336.15

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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.