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Finding the Fourth Proportional to 396,632.48, 547,349.80 and 215,340.84

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Solution

The fourth proportional to 396,632.48, 547,349.80 and 215,340.84 is: 297,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,632.48 : 547,349.80 = 215,340.84 : x
  2. Step 2: Convert to fraction form
    396,632.48/547,349.80 = 215,340.84/x
  3. Step 3: Cross multiply
    396,632.48x = 547,349.80 × 215,340.84
  4. Step 4: Simplify right side
    396,632.48x = 117,866,765,705.83
  5. Step 5: Solve for x
    x = 117,866,765,705.83/396,632.48
  6. Step 6: Final answer
    x = 297,168.72

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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.