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Finding the Fourth Proportional to 396,455.47, 547,108.52 and 215,167.41

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Solution

The fourth proportional to 396,455.47, 547,108.52 and 215,167.41 is: 296,931.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,455.47 : 547,108.52 = 215,167.41 : x
  2. Step 2: Convert to fraction form
    396,455.47/547,108.52 = 215,167.41/x
  3. Step 3: Cross multiply
    396,455.47x = 547,108.52 × 215,167.41
  4. Step 4: Simplify right side
    396,455.47x = 117,719,922,161.50
  5. Step 5: Solve for x
    x = 117,719,922,161.50/396,455.47
  6. Step 6: Final answer
    x = 296,931.01

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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.