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Finding the Fourth Proportional to 396,539.01, 547,209 and 215,247.06

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Solution

The fourth proportional to 396,539.01, 547,209 and 215,247.06 is: 297,032.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,539.01 : 547,209 = 215,247.06 : x
  2. Step 2: Convert to fraction form
    396,539.01/547,209 = 215,247.06/x
  3. Step 3: Cross multiply
    396,539.01x = 547,209 × 215,247.06
  4. Step 4: Simplify right side
    396,539.01x = 117,785,128,455.54
  5. Step 5: Solve for x
    x = 117,785,128,455.54/396,539.01
  6. Step 6: Final answer
    x = 297,032.89

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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.