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Finding the Fourth Proportional to 396,498.58, 547,168.60 and 215,210.55

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Solution

The fourth proportional to 396,498.58, 547,168.60 and 215,210.55 is: 296,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,498.58 : 547,168.60 = 215,210.55 : x
  2. Step 2: Convert to fraction form
    396,498.58/547,168.60 = 215,210.55/x
  3. Step 3: Cross multiply
    396,498.58x = 547,168.60 × 215,210.55
  4. Step 4: Simplify right side
    396,498.58x = 117,756,455,607.52
  5. Step 5: Solve for x
    x = 117,756,455,607.52/396,498.58
  6. Step 6: Final answer
    x = 296,990.86

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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.