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Finding the Fourth Proportional to 396,506.87, 547,164.75 and 215,214.89

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Solution

The fourth proportional to 396,506.87, 547,164.75 and 215,214.89 is: 296,988.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,506.87 : 547,164.75 = 215,214.89 : x
  2. Step 2: Convert to fraction form
    396,506.87/547,164.75 = 215,214.89/x
  3. Step 3: Cross multiply
    396,506.87x = 547,164.75 × 215,214.89
  4. Step 4: Simplify right side
    396,506.87x = 117,758,001,483.13
  5. Step 5: Solve for x
    x = 117,758,001,483.13/396,506.87
  6. Step 6: Final answer
    x = 296,988.55

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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.