Home / 2,661,405.90-3,992,108.85-978,290.70

Finding the Fourth Proportional to 2,661,405.90, 3,992,108.85 and 978,290.70

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Solution

The fourth proportional to 2,661,405.90, 3,992,108.85 and 978,290.70 is: 1,467,436.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661,405.90 : 3,992,108.85 = 978,290.70 : x
  2. Step 2: Convert to fraction form
    2,661,405.90/3,992,108.85 = 978,290.70/x
  3. Step 3: Cross multiply
    2,661,405.90x = 3,992,108.85 × 978,290.70
  4. Step 4: Simplify right side
    2,661,405.90x = 3,905,442,961,342.70
  5. Step 5: Solve for x
    x = 3,905,442,961,342.70/2,661,405.90
  6. Step 6: Final answer
    x = 1,467,436.05

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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.