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Finding the Fourth Proportional to 378.05, 565.94 and 247.80

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Solution

The fourth proportional to 378.05, 565.94 and 247.80 is: 370.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.05 : 565.94 = 247.80 : x
  2. Step 2: Convert to fraction form
    378.05/565.94 = 247.80/x
  3. Step 3: Cross multiply
    378.05x = 565.94 × 247.80
  4. Step 4: Simplify right side
    378.05x = 140,242.45
  5. Step 5: Solve for x
    x = 140,242.45/378.05
  6. Step 6: Final answer
    x = 370.96

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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.