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Finding the Fourth Proportional to 396,686.30, 547,412.12 and 215,394.30

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Solution

The fourth proportional to 396,686.30, 547,412.12 and 215,394.30 is: 297,236.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,686.30 : 547,412.12 = 215,394.30 : x
  2. Step 2: Convert to fraction form
    396,686.30/547,412.12 = 215,394.30/x
  3. Step 3: Cross multiply
    396,686.30x = 547,412.12 × 215,394.30
  4. Step 4: Simplify right side
    396,686.30x = 117,909,450,398.92
  5. Step 5: Solve for x
    x = 117,909,450,398.92/396,686.30
  6. Step 6: Final answer
    x = 297,236.00

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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.