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Finding the Fourth Proportional to 382.89, 527.40 and 339.15

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Solution

The fourth proportional to 382.89, 527.40 and 339.15 is: 467.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.89 : 527.40 = 339.15 : x
  2. Step 2: Convert to fraction form
    382.89/527.40 = 339.15/x
  3. Step 3: Cross multiply
    382.89x = 527.40 × 339.15
  4. Step 4: Simplify right side
    382.89x = 178,867.71
  5. Step 5: Solve for x
    x = 178,867.71/382.89
  6. Step 6: Final answer
    x = 467.15

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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.