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Finding the Fourth Proportional to 396,505.49, 547,162.92 and 215,213.51

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Solution

The fourth proportional to 396,505.49, 547,162.92 and 215,213.51 is: 296,986.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,505.49 : 547,162.92 = 215,213.51 : x
  2. Step 2: Convert to fraction form
    396,505.49/547,162.92 = 215,213.51/x
  3. Step 3: Cross multiply
    396,505.49x = 547,162.92 × 215,213.51
  4. Step 4: Simplify right side
    396,505.49x = 117,756,852,555.05
  5. Step 5: Solve for x
    x = 117,756,852,555.05/396,505.49
  6. Step 6: Final answer
    x = 296,986.69

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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.