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Finding the Fourth Proportional to 479.24, 661.29 and 269.39

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Solution

The fourth proportional to 479.24, 661.29 and 269.39 is: 371.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.24 : 661.29 = 269.39 : x
  2. Step 2: Convert to fraction form
    479.24/661.29 = 269.39/x
  3. Step 3: Cross multiply
    479.24x = 661.29 × 269.39
  4. Step 4: Simplify right side
    479.24x = 178,141.61
  5. Step 5: Solve for x
    x = 178,141.61/479.24
  6. Step 6: Final answer
    x = 371.72

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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.