Home / 839,905.70-1,259,858.55-520,312.10

Finding the Fourth Proportional to 839,905.70, 1,259,858.55 and 520,312.10

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Solution

The fourth proportional to 839,905.70, 1,259,858.55 and 520,312.10 is: 780,468.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,905.70 : 1,259,858.55 = 520,312.10 : x
  2. Step 2: Convert to fraction form
    839,905.70/1,259,858.55 = 520,312.10/x
  3. Step 3: Cross multiply
    839,905.70x = 1,259,858.55 × 520,312.10
  4. Step 4: Simplify right side
    839,905.70x = 655,519,647,853.46
  5. Step 5: Solve for x
    x = 655,519,647,853.46/839,905.70
  6. Step 6: Final answer
    x = 780,468.15

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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.