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Finding the Fourth Proportional to 371.14, 555.12 and 216.68

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Solution

The fourth proportional to 371.14, 555.12 and 216.68 is: 324.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.14 : 555.12 = 216.68 : x
  2. Step 2: Convert to fraction form
    371.14/555.12 = 216.68/x
  3. Step 3: Cross multiply
    371.14x = 555.12 × 216.68
  4. Step 4: Simplify right side
    371.14x = 120,283.40
  5. Step 5: Solve for x
    x = 120,283.40/371.14
  6. Step 6: Final answer
    x = 324.09

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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.