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Finding the Fourth Proportional to 396,630.72, 547,147.36 and 253,240

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Solution

The fourth proportional to 396,630.72, 547,147.36 and 253,240 is: 349,341.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,630.72 : 547,147.36 = 253,240 : x
  2. Step 2: Convert to fraction form
    396,630.72/547,147.36 = 253,240/x
  3. Step 3: Cross multiply
    396,630.72x = 547,147.36 × 253,240
  4. Step 4: Simplify right side
    396,630.72x = 138,559,597,446.40
  5. Step 5: Solve for x
    x = 138,559,597,446.40/396,630.72
  6. Step 6: Final answer
    x = 349,341.57

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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.