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Finding the Fourth Proportional to 382.79, 573.95 and 135.86

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Solution

The fourth proportional to 382.79, 573.95 and 135.86 is: 203.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.79 : 573.95 = 135.86 : x
  2. Step 2: Convert to fraction form
    382.79/573.95 = 135.86/x
  3. Step 3: Cross multiply
    382.79x = 573.95 × 135.86
  4. Step 4: Simplify right side
    382.79x = 77,974.32
  5. Step 5: Solve for x
    x = 77,974.32/382.79
  6. Step 6: Final answer
    x = 203.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.