Home / 1,261,820.80-1,889,620.80-838,806.40

Finding the Fourth Proportional to 1,261,820.80, 1,889,620.80 and 838,806.40

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Solution

The fourth proportional to 1,261,820.80, 1,889,620.80 and 838,806.40 is: 1,256,141.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,820.80 : 1,889,620.80 = 838,806.40 : x
  2. Step 2: Convert to fraction form
    1,261,820.80/1,889,620.80 = 838,806.40/x
  3. Step 3: Cross multiply
    1,261,820.80x = 1,889,620.80 × 838,806.40
  4. Step 4: Simplify right side
    1,261,820.80x = 1,585,026,020,613.12
  5. Step 5: Solve for x
    x = 1,585,026,020,613.12/1,261,820.80
  6. Step 6: Final answer
    x = 1,256,141.93

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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.