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Finding the Fourth Proportional to 396,457.54, 547,105.80 and 215,169.82

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Solution

The fourth proportional to 396,457.54, 547,105.80 and 215,169.82 is: 296,931.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,457.54 : 547,105.80 = 215,169.82 : x
  2. Step 2: Convert to fraction form
    396,457.54/547,105.80 = 215,169.82/x
  3. Step 3: Cross multiply
    396,457.54x = 547,105.80 × 215,169.82
  4. Step 4: Simplify right side
    396,457.54x = 117,720,656,506.96
  5. Step 5: Solve for x
    x = 117,720,656,506.96/396,457.54
  6. Step 6: Final answer
    x = 296,931.31

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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.