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Finding the Fourth Proportional to 396,381.60, 547,003.83 and 215,088.92

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Solution

The fourth proportional to 396,381.60, 547,003.83 and 215,088.92 is: 296,821.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,381.60 : 547,003.83 = 215,088.92 : x
  2. Step 2: Convert to fraction form
    396,381.60/547,003.83 = 215,088.92/x
  3. Step 3: Cross multiply
    396,381.60x = 547,003.83 × 215,088.92
  4. Step 4: Simplify right side
    396,381.60x = 117,654,464,398.07
  5. Step 5: Solve for x
    x = 117,654,464,398.07/396,381.60
  6. Step 6: Final answer
    x = 296,821.21

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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.