Home / 921,991.20-1,380,378.78-488,721.44

Finding the Fourth Proportional to 921,991.20, 1,380,378.78 and 488,721.44

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Solution

The fourth proportional to 921,991.20, 1,380,378.78 and 488,721.44 is: 731,699.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,991.20 : 1,380,378.78 = 488,721.44 : x
  2. Step 2: Convert to fraction form
    921,991.20/1,380,378.78 = 488,721.44/x
  3. Step 3: Cross multiply
    921,991.20x = 1,380,378.78 × 488,721.44
  4. Step 4: Simplify right side
    921,991.20x = 674,620,705,107.04
  5. Step 5: Solve for x
    x = 674,620,705,107.04/921,991.20
  6. Step 6: Final answer
    x = 731,699.72

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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.