Home / 921,734.40-1,381,759.20-780,489.12

Finding the Fourth Proportional to 921,734.40, 1,381,759.20 and 780,489.12

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Solution

The fourth proportional to 921,734.40, 1,381,759.20 and 780,489.12 is: 1,170,020.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,734.40 : 1,381,759.20 = 780,489.12 : x
  2. Step 2: Convert to fraction form
    921,734.40/1,381,759.20 = 780,489.12/x
  3. Step 3: Cross multiply
    921,734.40x = 1,381,759.20 × 780,489.12
  4. Step 4: Simplify right side
    921,734.40x = 1,078,448,022,059.90
  5. Step 5: Solve for x
    x = 1,078,448,022,059.90/921,734.40
  6. Step 6: Final answer
    x = 1,170,020.37

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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.