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Finding the Fourth Proportional to 367.80, 505.96 and 308.76

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Solution

The fourth proportional to 367.80, 505.96 and 308.76 is: 424.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.80 : 505.96 = 308.76 : x
  2. Step 2: Convert to fraction form
    367.80/505.96 = 308.76/x
  3. Step 3: Cross multiply
    367.80x = 505.96 × 308.76
  4. Step 4: Simplify right side
    367.80x = 156,220.21
  5. Step 5: Solve for x
    x = 156,220.21/367.80
  6. Step 6: Final answer
    x = 424.74

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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.