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Finding the Fourth Proportional to 429,400.56, 644,100.88 and 133,912.56

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Solution

The fourth proportional to 429,400.56, 644,100.88 and 133,912.56 is: 200,868.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,400.56 : 644,100.88 = 133,912.56 : x
  2. Step 2: Convert to fraction form
    429,400.56/644,100.88 = 133,912.56/x
  3. Step 3: Cross multiply
    429,400.56x = 644,100.88 × 133,912.56
  4. Step 4: Simplify right side
    429,400.56x = 86,253,197,739.05
  5. Step 5: Solve for x
    x = 86,253,197,739.05/429,400.56
  6. Step 6: Final answer
    x = 200,868.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.