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Finding the Fourth Proportional to 667,306.48, 920,872.56 and 380,819.20

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Solution

The fourth proportional to 667,306.48, 920,872.56 and 380,819.20 is: 525,524.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,306.48 : 920,872.56 = 380,819.20 : x
  2. Step 2: Convert to fraction form
    667,306.48/920,872.56 = 380,819.20/x
  3. Step 3: Cross multiply
    667,306.48x = 920,872.56 × 380,819.20
  4. Step 4: Simplify right side
    667,306.48x = 350,685,951,601.15
  5. Step 5: Solve for x
    x = 350,685,951,601.15/667,306.48
  6. Step 6: Final answer
    x = 525,524.57

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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.