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Finding the Fourth Proportional to 394,672.32, 544,639.68 and 215,824.32

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Solution

The fourth proportional to 394,672.32, 544,639.68 and 215,824.32 is: 297,833.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,672.32 : 544,639.68 = 215,824.32 : x
  2. Step 2: Convert to fraction form
    394,672.32/544,639.68 = 215,824.32/x
  3. Step 3: Cross multiply
    394,672.32x = 544,639.68 × 215,824.32
  4. Step 4: Simplify right side
    394,672.32x = 117,546,488,581.02
  5. Step 5: Solve for x
    x = 117,546,488,581.02/394,672.32
  6. Step 6: Final answer
    x = 297,833.12

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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.