Home / 1,398,979.20-2,098,468.80-1,288,754.40

Finding the Fourth Proportional to 1,398,979.20, 2,098,468.80 and 1,288,754.40

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Solution

The fourth proportional to 1,398,979.20, 2,098,468.80 and 1,288,754.40 is: 1,933,131.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,979.20 : 2,098,468.80 = 1,288,754.40 : x
  2. Step 2: Convert to fraction form
    1,398,979.20/2,098,468.80 = 1,288,754.40/x
  3. Step 3: Cross multiply
    1,398,979.20x = 2,098,468.80 × 1,288,754.40
  4. Step 4: Simplify right side
    1,398,979.20x = 2,704,410,899,262.72
  5. Step 5: Solve for x
    x = 2,704,410,899,262.72/1,398,979.20
  6. Step 6: Final answer
    x = 1,933,131.60

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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.