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Finding the Fourth Proportional to 396,798.57, 547,585.98 and 215,512.20

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Solution

The fourth proportional to 396,798.57, 547,585.98 and 215,512.20 is: 297,408.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,798.57 : 547,585.98 = 215,512.20 : x
  2. Step 2: Convert to fraction form
    396,798.57/547,585.98 = 215,512.20/x
  3. Step 3: Cross multiply
    396,798.57x = 547,585.98 × 215,512.20
  4. Step 4: Simplify right side
    396,798.57x = 118,011,459,238.96
  5. Step 5: Solve for x
    x = 118,011,459,238.96/396,798.57
  6. Step 6: Final answer
    x = 297,408.98

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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.