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Finding the Fourth Proportional to 862,809.09, 1,190,680.52 and 500,447.49

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Solution

The fourth proportional to 862,809.09, 1,190,680.52 and 500,447.49 is: 690,619.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,809.09 : 1,190,680.52 = 500,447.49 : x
  2. Step 2: Convert to fraction form
    862,809.09/1,190,680.52 = 500,447.49/x
  3. Step 3: Cross multiply
    862,809.09x = 1,190,680.52 × 500,447.49
  4. Step 4: Simplify right side
    862,809.09x = 595,873,077,625.90
  5. Step 5: Solve for x
    x = 595,873,077,625.90/862,809.09
  6. Step 6: Final answer
    x = 690,619.84

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Double scale
Find fourth proportional to 862,810.09, 1,190,681.90 and 500,448.49
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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.