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Finding the Fourth Proportional to 371.30, 556.08 and 216.90

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Solution

The fourth proportional to 371.30, 556.08 and 216.90 is: 324.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.30 : 556.08 = 216.90 : x
  2. Step 2: Convert to fraction form
    371.30/556.08 = 216.90/x
  3. Step 3: Cross multiply
    371.30x = 556.08 × 216.90
  4. Step 4: Simplify right side
    371.30x = 120,613.75
  5. Step 5: Solve for x
    x = 120,613.75/371.30
  6. Step 6: Final answer
    x = 324.84

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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.