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Finding the Fourth Proportional to 269.58, 372.16 and 199.68

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Solution

The fourth proportional to 269.58, 372.16 and 199.68 is: 275.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.58 : 372.16 = 199.68 : x
  2. Step 2: Convert to fraction form
    269.58/372.16 = 199.68/x
  3. Step 3: Cross multiply
    269.58x = 372.16 × 199.68
  4. Step 4: Simplify right side
    269.58x = 74,312.91
  5. Step 5: Solve for x
    x = 74,312.91/269.58
  6. Step 6: Final answer
    x = 275.66

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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.