Home / 839,901.40-1,259,852.10-278,935.90

Finding the Fourth Proportional to 839,901.40, 1,259,852.10 and 278,935.90

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Solution

The fourth proportional to 839,901.40, 1,259,852.10 and 278,935.90 is: 418,403.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,901.40 : 1,259,852.10 = 278,935.90 : x
  2. Step 2: Convert to fraction form
    839,901.40/1,259,852.10 = 278,935.90/x
  3. Step 3: Cross multiply
    839,901.40x = 1,259,852.10 × 278,935.90
  4. Step 4: Simplify right side
    839,901.40x = 351,417,979,380.39
  5. Step 5: Solve for x
    x = 351,417,979,380.39/839,901.40
  6. Step 6: Final answer
    x = 418,403.85

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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.