Home / 785,449.65-1,084,559.72-640,278.21

Finding the Fourth Proportional to 785,449.65, 1,084,559.72 and 640,278.21

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Solution

The fourth proportional to 785,449.65, 1,084,559.72 and 640,278.21 is: 884,104.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,449.65 : 1,084,559.72 = 640,278.21 : x
  2. Step 2: Convert to fraction form
    785,449.65/1,084,559.72 = 640,278.21/x
  3. Step 3: Cross multiply
    785,449.65x = 1,084,559.72 × 640,278.21
  4. Step 4: Simplify right side
    785,449.65x = 694,419,957,025.41
  5. Step 5: Solve for x
    x = 694,419,957,025.41/785,449.65
  6. Step 6: Final answer
    x = 884,104.99

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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.