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Finding the Fourth Proportional to 410.64, 615.84 and 136.68

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Solution

The fourth proportional to 410.64, 615.84 and 136.68 is: 204.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.64 : 615.84 = 136.68 : x
  2. Step 2: Convert to fraction form
    410.64/615.84 = 136.68/x
  3. Step 3: Cross multiply
    410.64x = 615.84 × 136.68
  4. Step 4: Simplify right side
    410.64x = 84,173.01
  5. Step 5: Solve for x
    x = 84,173.01/410.64
  6. Step 6: Final answer
    x = 204.98

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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.