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Finding the Fourth Proportional to 364.15, 502.45 and 216.78

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Solution

The fourth proportional to 364.15, 502.45 and 216.78 is: 299.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.15 : 502.45 = 216.78 : x
  2. Step 2: Convert to fraction form
    364.15/502.45 = 216.78/x
  3. Step 3: Cross multiply
    364.15x = 502.45 × 216.78
  4. Step 4: Simplify right side
    364.15x = 108,919.90
  5. Step 5: Solve for x
    x = 108,919.90/364.15
  6. Step 6: Final answer
    x = 299.11

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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.