Home / 839,057.20-1,258,585.80-389,628.70

Finding the Fourth Proportional to 839,057.20, 1,258,585.80 and 389,628.70

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Solution

The fourth proportional to 839,057.20, 1,258,585.80 and 389,628.70 is: 584,443.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,057.20 : 1,258,585.80 = 389,628.70 : x
  2. Step 2: Convert to fraction form
    839,057.20/1,258,585.80 = 389,628.70/x
  3. Step 3: Cross multiply
    839,057.20x = 1,258,585.80 × 389,628.70
  4. Step 4: Simplify right side
    839,057.20x = 490,381,149,092.46
  5. Step 5: Solve for x
    x = 490,381,149,092.46/839,057.20
  6. Step 6: Final answer
    x = 584,443.05

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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.