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Finding the Fourth Proportional to 396,715.80, 547,467.18 and 217,867.80

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Solution

The fourth proportional to 396,715.80, 547,467.18 and 217,867.80 is: 300,657.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,715.80 : 547,467.18 = 217,867.80 : x
  2. Step 2: Convert to fraction form
    396,715.80/547,467.18 = 217,867.80/x
  3. Step 3: Cross multiply
    396,715.80x = 547,467.18 × 217,867.80
  4. Step 4: Simplify right side
    396,715.80x = 119,275,470,078.80
  5. Step 5: Solve for x
    x = 119,275,470,078.80/396,715.80
  6. Step 6: Final answer
    x = 300,657.22

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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.