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Finding the Fourth Proportional to 396,601.80, 547,314.75 and 215,315.70

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Solution

The fourth proportional to 396,601.80, 547,314.75 and 215,315.70 is: 297,137.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,601.80 : 547,314.75 = 215,315.70 : x
  2. Step 2: Convert to fraction form
    396,601.80/547,314.75 = 215,315.70/x
  3. Step 3: Cross multiply
    396,601.80x = 547,314.75 × 215,315.70
  4. Step 4: Simplify right side
    396,601.80x = 117,845,458,516.58
  5. Step 5: Solve for x
    x = 117,845,458,516.58/396,601.80
  6. Step 6: Final answer
    x = 297,137.98

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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.