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Finding the Fourth Proportional to 379.92, 524.79 and 282.18

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Solution

The fourth proportional to 379.92, 524.79 and 282.18 is: 389.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.92 : 524.79 = 282.18 : x
  2. Step 2: Convert to fraction form
    379.92/524.79 = 282.18/x
  3. Step 3: Cross multiply
    379.92x = 524.79 × 282.18
  4. Step 4: Simplify right side
    379.92x = 148,085.24
  5. Step 5: Solve for x
    x = 148,085.24/379.92
  6. Step 6: Final answer
    x = 389.78

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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.