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Finding the Fourth Proportional to 777,660.75, 1,073,171.85 and 419,964.75

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Solution

The fourth proportional to 777,660.75, 1,073,171.85 and 419,964.75 is: 579,551.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,660.75 : 1,073,171.85 = 419,964.75 : x
  2. Step 2: Convert to fraction form
    777,660.75/1,073,171.85 = 419,964.75/x
  3. Step 3: Cross multiply
    777,660.75x = 1,073,171.85 × 419,964.75
  4. Step 4: Simplify right side
    777,660.75x = 450,694,347,692.29
  5. Step 5: Solve for x
    x = 450,694,347,692.29/777,660.75
  6. Step 6: Final answer
    x = 579,551.36

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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.