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Finding the Fourth Proportional to 396,814.52, 547,608.06 and 215,528.20

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Solution

The fourth proportional to 396,814.52, 547,608.06 and 215,528.20 is: 297,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,814.52 : 547,608.06 = 215,528.20 : x
  2. Step 2: Convert to fraction form
    396,814.52/547,608.06 = 215,528.20/x
  3. Step 3: Cross multiply
    396,814.52x = 547,608.06 × 215,528.20
  4. Step 4: Simplify right side
    396,814.52x = 118,024,979,477.29
  5. Step 5: Solve for x
    x = 118,024,979,477.29/396,814.52
  6. Step 6: Final answer
    x = 297,431.10

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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.