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Finding the Fourth Proportional to 379.82, 524.02 and 248.90

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Solution

The fourth proportional to 379.82, 524.02 and 248.90 is: 343.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.82 : 524.02 = 248.90 : x
  2. Step 2: Convert to fraction form
    379.82/524.02 = 248.90/x
  3. Step 3: Cross multiply
    379.82x = 524.02 × 248.90
  4. Step 4: Simplify right side
    379.82x = 130,428.58
  5. Step 5: Solve for x
    x = 130,428.58/379.82
  6. Step 6: Final answer
    x = 343.40

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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.