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Finding the Fourth Proportional to 410.26, 615.12 and 218.02

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Solution

The fourth proportional to 410.26, 615.12 and 218.02 is: 326.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.26 : 615.12 = 218.02 : x
  2. Step 2: Convert to fraction form
    410.26/615.12 = 218.02/x
  3. Step 3: Cross multiply
    410.26x = 615.12 × 218.02
  4. Step 4: Simplify right side
    410.26x = 134,108.46
  5. Step 5: Solve for x
    x = 134,108.46/410.26
  6. Step 6: Final answer
    x = 326.89

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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.