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Finding the Fourth Proportional to 396,492.76, 547,158.65 and 215,204.68

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Solution

The fourth proportional to 396,492.76, 547,158.65 and 215,204.68 is: 296,981.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,492.76 : 547,158.65 = 215,204.68 : x
  2. Step 2: Convert to fraction form
    396,492.76/547,158.65 = 215,204.68/x
  3. Step 3: Cross multiply
    396,492.76x = 547,158.65 × 215,204.68
  4. Step 4: Simplify right side
    396,492.76x = 117,751,101,790.41
  5. Step 5: Solve for x
    x = 117,751,101,790.41/396,492.76
  6. Step 6: Final answer
    x = 296,981.72

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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.