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Finding the Fourth Proportional to 410.79, 616.15 and 215.68

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Solution

The fourth proportional to 410.79, 616.15 and 215.68 is: 323.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.79 : 616.15 = 215.68 : x
  2. Step 2: Convert to fraction form
    410.79/616.15 = 215.68/x
  3. Step 3: Cross multiply
    410.79x = 616.15 × 215.68
  4. Step 4: Simplify right side
    410.79x = 132,891.23
  5. Step 5: Solve for x
    x = 132,891.23/410.79
  6. Step 6: Final answer
    x = 323.50

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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.