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Finding the Fourth Proportional to 382.45, 527.79 and 207.80

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Solution

The fourth proportional to 382.45, 527.79 and 207.80 is: 286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.45 : 527.79 = 207.80 : x
  2. Step 2: Convert to fraction form
    382.45/527.79 = 207.80/x
  3. Step 3: Cross multiply
    382.45x = 527.79 × 207.80
  4. Step 4: Simplify right side
    382.45x = 109,674.76
  5. Step 5: Solve for x
    x = 109,674.76/382.45
  6. Step 6: Final answer
    x = 286.77

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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.