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Finding the Fourth Proportional to 269.32, 403.74 and 261.16

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Solution

The fourth proportional to 269.32, 403.74 and 261.16 is: 391.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.32 : 403.74 = 261.16 : x
  2. Step 2: Convert to fraction form
    269.32/403.74 = 261.16/x
  3. Step 3: Cross multiply
    269.32x = 403.74 × 261.16
  4. Step 4: Simplify right side
    269.32x = 105,440.74
  5. Step 5: Solve for x
    x = 105,440.74/269.32
  6. Step 6: Final answer
    x = 391.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.