Home / 839,761.80-1,259,642.70-766,278.60

Finding the Fourth Proportional to 839,761.80, 1,259,642.70 and 766,278.60

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Solution

The fourth proportional to 839,761.80, 1,259,642.70 and 766,278.60 is: 1,149,417.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,761.80 : 1,259,642.70 = 766,278.60 : x
  2. Step 2: Convert to fraction form
    839,761.80/1,259,642.70 = 766,278.60/x
  3. Step 3: Cross multiply
    839,761.80x = 1,259,642.70 × 766,278.60
  4. Step 4: Simplify right side
    839,761.80x = 965,237,244,656.22
  5. Step 5: Solve for x
    x = 965,237,244,656.22/839,761.80
  6. Step 6: Final answer
    x = 1,149,417.90

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Double scale
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Similar ratio
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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.