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Finding the Fourth Proportional to 278.03, 416.30 and 216.87

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Solution

The fourth proportional to 278.03, 416.30 and 216.87 is: 324.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.03 : 416.30 = 216.87 : x
  2. Step 2: Convert to fraction form
    278.03/416.30 = 216.87/x
  3. Step 3: Cross multiply
    278.03x = 416.30 × 216.87
  4. Step 4: Simplify right side
    278.03x = 90,281.90
  5. Step 5: Solve for x
    x = 90,281.90/278.03
  6. Step 6: Final answer
    x = 324.73

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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.