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Finding the Fourth Proportional to 443.92, 612.64 and 247.43

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Solution

The fourth proportional to 443.92, 612.64 and 247.43 is: 341.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.92 : 612.64 = 247.43 : x
  2. Step 2: Convert to fraction form
    443.92/612.64 = 247.43/x
  3. Step 3: Cross multiply
    443.92x = 612.64 × 247.43
  4. Step 4: Simplify right side
    443.92x = 151,585.52
  5. Step 5: Solve for x
    x = 151,585.52/443.92
  6. Step 6: Final answer
    x = 341.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.