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Finding the Fourth Proportional to 396,859.50, 547,666.20 and 218,011.50

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Solution

The fourth proportional to 396,859.50, 547,666.20 and 218,011.50 is: 300,855.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,859.50 : 547,666.20 = 218,011.50 : x
  2. Step 2: Convert to fraction form
    396,859.50/547,666.20 = 218,011.50/x
  3. Step 3: Cross multiply
    396,859.50x = 547,666.20 × 218,011.50
  4. Step 4: Simplify right side
    396,859.50x = 119,397,529,761.30
  5. Step 5: Solve for x
    x = 119,397,529,761.30/396,859.50
  6. Step 6: Final answer
    x = 300,855.92

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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.