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Finding the Fourth Proportional to 379, 523.47 and 314.20

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Solution

The fourth proportional to 379, 523.47 and 314.20 is: 433.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    379 : 523.47 = 314.20 : x
  2. Step 2: Convert to fraction form
    379/523.47 = 314.20/x
  3. Step 3: Cross multiply
    379x = 523.47 × 314.20
  4. Step 4: Simplify right side
    379x = 164,474.27
  5. Step 5: Solve for x
    x = 164,474.27/379
  6. Step 6: Final answer
    x = 433.97

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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.