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Finding the Fourth Proportional to 382.66, 527.31 and 345.40

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Solution

The fourth proportional to 382.66, 527.31 and 345.40 is: 475.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.66 : 527.31 = 345.40 : x
  2. Step 2: Convert to fraction form
    382.66/527.31 = 345.40/x
  3. Step 3: Cross multiply
    382.66x = 527.31 × 345.40
  4. Step 4: Simplify right side
    382.66x = 182,132.87
  5. Step 5: Solve for x
    x = 182,132.87/382.66
  6. Step 6: Final answer
    x = 475.97

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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.