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Finding the Fourth Proportional to 379.60, 524.16 and 269.20

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Solution

The fourth proportional to 379.60, 524.16 and 269.20 is: 371.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.60 : 524.16 = 269.20 : x
  2. Step 2: Convert to fraction form
    379.60/524.16 = 269.20/x
  3. Step 3: Cross multiply
    379.60x = 524.16 × 269.20
  4. Step 4: Simplify right side
    379.60x = 141,103.87
  5. Step 5: Solve for x
    x = 141,103.87/379.60
  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.