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Finding the Fourth Proportional to 396,440.88, 547,088.69 and 215,152.76

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Solution

The fourth proportional to 396,440.88, 547,088.69 and 215,152.76 is: 296,910.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,440.88 : 547,088.69 = 215,152.76 : x
  2. Step 2: Convert to fraction form
    396,440.88/547,088.69 = 215,152.76/x
  3. Step 3: Cross multiply
    396,440.88x = 547,088.69 × 215,152.76
  4. Step 4: Simplify right side
    396,440.88x = 117,707,641,618.28
  5. Step 5: Solve for x
    x = 117,707,641,618.28/396,440.88
  6. Step 6: Final answer
    x = 296,910.96

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1.5x scale

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.