Home / 677,945.70-1,016,918.55-278,380.80

Finding the Fourth Proportional to 677,945.70, 1,016,918.55 and 278,380.80

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Solution

The fourth proportional to 677,945.70, 1,016,918.55 and 278,380.80 is: 417,571.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,945.70 : 1,016,918.55 = 278,380.80 : x
  2. Step 2: Convert to fraction form
    677,945.70/1,016,918.55 = 278,380.80/x
  3. Step 3: Cross multiply
    677,945.70x = 1,016,918.55 × 278,380.80
  4. Step 4: Simplify right side
    677,945.70x = 283,090,599,483.84
  5. Step 5: Solve for x
    x = 283,090,599,483.84/677,945.70
  6. Step 6: Final answer
    x = 417,571.20

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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.