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Finding the Fourth Proportional to 410.94, 616.32 and 205.47

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Solution

The fourth proportional to 410.94, 616.32 and 205.47 is: 308.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.94 : 616.32 = 205.47 : x
  2. Step 2: Convert to fraction form
    410.94/616.32 = 205.47/x
  3. Step 3: Cross multiply
    410.94x = 616.32 × 205.47
  4. Step 4: Simplify right side
    410.94x = 126,635.27
  5. Step 5: Solve for x
    x = 126,635.27/410.94
  6. Step 6: Final answer
    x = 308.16

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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.