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Finding the Fourth Proportional to 410.04, 615.24 and 408.78

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Solution

The fourth proportional to 410.04, 615.24 and 408.78 is: 613.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.04 : 615.24 = 408.78 : x
  2. Step 2: Convert to fraction form
    410.04/615.24 = 408.78/x
  3. Step 3: Cross multiply
    410.04x = 615.24 × 408.78
  4. Step 4: Simplify right side
    410.04x = 251,497.81
  5. Step 5: Solve for x
    x = 251,497.81/410.04
  6. Step 6: Final answer
    x = 613.35

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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.