Home / 679,947.80-1,019,921.70-206,571.65

Finding the Fourth Proportional to 679,947.80, 1,019,921.70 and 206,571.65

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Solution

The fourth proportional to 679,947.80, 1,019,921.70 and 206,571.65 is: 309,857.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,947.80 : 1,019,921.70 = 206,571.65 : x
  2. Step 2: Convert to fraction form
    679,947.80/1,019,921.70 = 206,571.65/x
  3. Step 3: Cross multiply
    679,947.80x = 1,019,921.70 × 206,571.65
  4. Step 4: Simplify right side
    679,947.80x = 210,686,908,439.81
  5. Step 5: Solve for x
    x = 210,686,908,439.81/679,947.80
  6. Step 6: Final answer
    x = 309,857.48

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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.