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Finding the Fourth Proportional to 396,502.37, 547,158.60 and 215,210.40

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Solution

The fourth proportional to 396,502.37, 547,158.60 and 215,210.40 is: 296,982.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,502.37 : 547,158.60 = 215,210.40 : x
  2. Step 2: Convert to fraction form
    396,502.37/547,158.60 = 215,210.40/x
  3. Step 3: Cross multiply
    396,502.37x = 547,158.60 × 215,210.40
  4. Step 4: Simplify right side
    396,502.37x = 117,754,221,169.44
  5. Step 5: Solve for x
    x = 117,754,221,169.44/396,502.37
  6. Step 6: Final answer
    x = 296,982.39

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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.