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Finding the Fourth Proportional to 410.12, 615.34 and 193.88

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Solution

The fourth proportional to 410.12, 615.34 and 193.88 is: 290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.12 : 615.34 = 193.88 : x
  2. Step 2: Convert to fraction form
    410.12/615.34 = 193.88/x
  3. Step 3: Cross multiply
    410.12x = 615.34 × 193.88
  4. Step 4: Simplify right side
    410.12x = 119,302.12
  5. Step 5: Solve for x
    x = 119,302.12/410.12
  6. Step 6: Final answer
    x = 290.90

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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.