Home / 2,661,387.40-3,992,081.10-978,272.20

Finding the Fourth Proportional to 2,661,387.40, 3,992,081.10 and 978,272.20

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Solution

The fourth proportional to 2,661,387.40, 3,992,081.10 and 978,272.20 is: 1,467,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661,387.40 : 3,992,081.10 = 978,272.20 : x
  2. Step 2: Convert to fraction form
    2,661,387.40/3,992,081.10 = 978,272.20/x
  3. Step 3: Cross multiply
    2,661,387.40x = 3,992,081.10 × 978,272.20
  4. Step 4: Simplify right side
    2,661,387.40x = 3,905,341,960,275.42
  5. Step 5: Solve for x
    x = 3,905,341,960,275.42/2,661,387.40
  6. Step 6: Final answer
    x = 1,467,408.30

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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.