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Finding the Fourth Proportional to 479.15, 661.15 and 269.29

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Solution

The fourth proportional to 479.15, 661.15 and 269.29 is: 371.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.15 : 661.15 = 269.29 : x
  2. Step 2: Convert to fraction form
    479.15/661.15 = 269.29/x
  3. Step 3: Cross multiply
    479.15x = 661.15 × 269.29
  4. Step 4: Simplify right side
    479.15x = 178,043.26
  5. Step 5: Solve for x
    x = 178,043.26/479.15
  6. Step 6: Final answer
    x = 371.58

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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.