Home / 839,965.80-1,259,948.70-279,000.30

Finding the Fourth Proportional to 839,965.80, 1,259,948.70 and 279,000.30

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Solution

The fourth proportional to 839,965.80, 1,259,948.70 and 279,000.30 is: 418,500.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,965.80 : 1,259,948.70 = 279,000.30 : x
  2. Step 2: Convert to fraction form
    839,965.80/1,259,948.70 = 279,000.30/x
  3. Step 3: Cross multiply
    839,965.80x = 1,259,948.70 × 279,000.30
  4. Step 4: Simplify right side
    839,965.80x = 351,526,065,284.61
  5. Step 5: Solve for x
    x = 351,526,065,284.61/839,965.80
  6. Step 6: Final answer
    x = 418,500.45

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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.