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Finding the Fourth Proportional to 402.06, 602.42 and 216.84

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Solution

The fourth proportional to 402.06, 602.42 and 216.84 is: 324.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.06 : 602.42 = 216.84 : x
  2. Step 2: Convert to fraction form
    402.06/602.42 = 216.84/x
  3. Step 3: Cross multiply
    402.06x = 602.42 × 216.84
  4. Step 4: Simplify right side
    402.06x = 130,628.75
  5. Step 5: Solve for x
    x = 130,628.75/402.06
  6. Step 6: Final answer
    x = 324.90

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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.