Home / 839,717.80-1,259,576.70-278,752.30

Finding the Fourth Proportional to 839,717.80, 1,259,576.70 and 278,752.30

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Solution

The fourth proportional to 839,717.80, 1,259,576.70 and 278,752.30 is: 418,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,717.80 : 1,259,576.70 = 278,752.30 : x
  2. Step 2: Convert to fraction form
    839,717.80/1,259,576.70 = 278,752.30/x
  3. Step 3: Cross multiply
    839,717.80x = 1,259,576.70 × 278,752.30
  4. Step 4: Simplify right side
    839,717.80x = 351,109,902,151.41
  5. Step 5: Solve for x
    x = 351,109,902,151.41/839,717.80
  6. Step 6: Final answer
    x = 418,128.45

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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.