Home / 1,274,858.87-1,912,428.41-421,619.71

Finding the Fourth Proportional to 1,274,858.87, 1,912,428.41 and 421,619.71

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Solution

The fourth proportional to 1,274,858.87, 1,912,428.41 and 421,619.71 is: 632,475.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274,858.87 : 1,912,428.41 = 421,619.71 : x
  2. Step 2: Convert to fraction form
    1,274,858.87/1,912,428.41 = 421,619.71/x
  3. Step 3: Cross multiply
    1,274,858.87x = 1,912,428.41 × 421,619.71
  4. Step 4: Simplify right side
    1,274,858.87x = 806,317,519,190.31
  5. Step 5: Solve for x
    x = 806,317,519,190.31/1,274,858.87
  6. Step 6: Final answer
    x = 632,475.90

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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.