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Finding the Fourth Proportional to 396,221.79, 547,191.54 and 370,830.72

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Solution

The fourth proportional to 396,221.79, 547,191.54 and 370,830.72 is: 512,125.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,221.79 : 547,191.54 = 370,830.72 : x
  2. Step 2: Convert to fraction form
    396,221.79/547,191.54 = 370,830.72/x
  3. Step 3: Cross multiply
    396,221.79x = 547,191.54 × 370,830.72
  4. Step 4: Simplify right side
    396,221.79x = 202,915,432,756.11
  5. Step 5: Solve for x
    x = 202,915,432,756.11/396,221.79
  6. Step 6: Final answer
    x = 512,125.88

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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.