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Finding the Fourth Proportional to 408.68, 612.54 and 293.40

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Solution

The fourth proportional to 408.68, 612.54 and 293.40 is: 439.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.68 : 612.54 = 293.40 : x
  2. Step 2: Convert to fraction form
    408.68/612.54 = 293.40/x
  3. Step 3: Cross multiply
    408.68x = 612.54 × 293.40
  4. Step 4: Simplify right side
    408.68x = 179,719.24
  5. Step 5: Solve for x
    x = 179,719.24/408.68
  6. Step 6: Final answer
    x = 439.76

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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.