Home / 2,661,404.20-3,992,106.30-978,159.40

Finding the Fourth Proportional to 2,661,404.20, 3,992,106.30 and 978,159.40

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Solution

The fourth proportional to 2,661,404.20, 3,992,106.30 and 978,159.40 is: 1,467,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661,404.20 : 3,992,106.30 = 978,159.40 : x
  2. Step 2: Convert to fraction form
    2,661,404.20/3,992,106.30 = 978,159.40/x
  3. Step 3: Cross multiply
    2,661,404.20x = 3,992,106.30 × 978,159.40
  4. Step 4: Simplify right side
    2,661,404.20x = 3,904,916,303,144.22
  5. Step 5: Solve for x
    x = 3,904,916,303,144.22/2,661,404.20
  6. Step 6: Final answer
    x = 1,467,239.10

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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.