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Finding the Fourth Proportional to 396,568.76, 547,261.06 and 215,276.80

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Solution

The fourth proportional to 396,568.76, 547,261.06 and 215,276.80 is: 297,079.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,568.76 : 547,261.06 = 215,276.80 : x
  2. Step 2: Convert to fraction form
    396,568.76/547,261.06 = 215,276.80/x
  3. Step 3: Cross multiply
    396,568.76x = 547,261.06 × 215,276.80
  4. Step 4: Simplify right side
    396,568.76x = 117,812,609,761.41
  5. Step 5: Solve for x
    x = 117,812,609,761.41/396,568.76
  6. Step 6: Final answer
    x = 297,079.91

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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.