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Finding the Fourth Proportional to 410.44, 615.89 and 218.06

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Solution

The fourth proportional to 410.44, 615.89 and 218.06 is: 327.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.44 : 615.89 = 218.06 : x
  2. Step 2: Convert to fraction form
    410.44/615.89 = 218.06/x
  3. Step 3: Cross multiply
    410.44x = 615.89 × 218.06
  4. Step 4: Simplify right side
    410.44x = 134,300.97
  5. Step 5: Solve for x
    x = 134,300.97/410.44
  6. Step 6: Final answer
    x = 327.21

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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.