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Finding the Fourth Proportional to 479.10, 661.11 and 269.31

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Solution

The fourth proportional to 479.10, 661.11 and 269.31 is: 371.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.10 : 661.11 = 269.31 : x
  2. Step 2: Convert to fraction form
    479.10/661.11 = 269.31/x
  3. Step 3: Cross multiply
    479.10x = 661.11 × 269.31
  4. Step 4: Simplify right side
    479.10x = 178,043.53
  5. Step 5: Solve for x
    x = 178,043.53/479.10
  6. Step 6: Final answer
    x = 371.62

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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.