Home / 820,139.70-1,230,209.55-654,251.70

Finding the Fourth Proportional to 820,139.70, 1,230,209.55 and 654,251.70

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Solution

The fourth proportional to 820,139.70, 1,230,209.55 and 654,251.70 is: 981,377.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,139.70 : 1,230,209.55 = 654,251.70 : x
  2. Step 2: Convert to fraction form
    820,139.70/1,230,209.55 = 654,251.70/x
  3. Step 3: Cross multiply
    820,139.70x = 1,230,209.55 × 654,251.70
  4. Step 4: Simplify right side
    820,139.70x = 804,866,689,443.74
  5. Step 5: Solve for x
    x = 804,866,689,443.74/820,139.70
  6. Step 6: Final answer
    x = 981,377.55

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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.