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Finding the Fourth Proportional to 354.34, 489.06 and 199.12

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Solution

The fourth proportional to 354.34, 489.06 and 199.12 is: 274.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.34 : 489.06 = 199.12 : x
  2. Step 2: Convert to fraction form
    354.34/489.06 = 199.12/x
  3. Step 3: Cross multiply
    354.34x = 489.06 × 199.12
  4. Step 4: Simplify right side
    354.34x = 97,381.63
  5. Step 5: Solve for x
    x = 97,381.63/354.34
  6. Step 6: Final answer
    x = 274.83

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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.