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Finding the Fourth Proportional to 396,679.80, 547,281.32 and 253,523.64

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Solution

The fourth proportional to 396,679.80, 547,281.32 and 253,523.64 is: 349,775.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,679.80 : 547,281.32 = 253,523.64 : x
  2. Step 2: Convert to fraction form
    396,679.80/547,281.32 = 253,523.64/x
  3. Step 3: Cross multiply
    396,679.80x = 547,281.32 × 253,523.64
  4. Step 4: Simplify right side
    396,679.80x = 138,748,751,082.79
  5. Step 5: Solve for x
    x = 138,748,751,082.79/396,679.80
  6. Step 6: Final answer
    x = 349,775.19

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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.