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Finding the Fourth Proportional to 410.36, 615.60 and 121.88

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Solution

The fourth proportional to 410.36, 615.60 and 121.88 is: 182.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.36 : 615.60 = 121.88 : x
  2. Step 2: Convert to fraction form
    410.36/615.60 = 121.88/x
  3. Step 3: Cross multiply
    410.36x = 615.60 × 121.88
  4. Step 4: Simplify right side
    410.36x = 75,029.33
  5. Step 5: Solve for x
    x = 75,029.33/410.36
  6. Step 6: Final answer
    x = 182.84

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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.