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Finding the Fourth Proportional to 410.19, 615.09 and 136.20

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Solution

The fourth proportional to 410.19, 615.09 and 136.20 is: 204.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.19 : 615.09 = 136.20 : x
  2. Step 2: Convert to fraction form
    410.19/615.09 = 136.20/x
  3. Step 3: Cross multiply
    410.19x = 615.09 × 136.20
  4. Step 4: Simplify right side
    410.19x = 83,775.26
  5. Step 5: Solve for x
    x = 83,775.26/410.19
  6. Step 6: Final answer
    x = 204.24

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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.