Home / 919,067.80-1,378,644.90-288,002.20

Finding the Fourth Proportional to 919,067.80, 1,378,644.90 and 288,002.20

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Solution

The fourth proportional to 919,067.80, 1,378,644.90 and 288,002.20 is: 432,016.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,067.80 : 1,378,644.90 = 288,002.20 : x
  2. Step 2: Convert to fraction form
    919,067.80/1,378,644.90 = 288,002.20/x
  3. Step 3: Cross multiply
    919,067.80x = 1,378,644.90 × 288,002.20
  4. Step 4: Simplify right side
    919,067.80x = 397,052,764,218.78
  5. Step 5: Solve for x
    x = 397,052,764,218.78/919,067.80
  6. Step 6: Final answer
    x = 432,016.84

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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.