Home / 2,661,320.40-3,991,980.60-978,205.20

Finding the Fourth Proportional to 2,661,320.40, 3,991,980.60 and 978,205.20

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Solution

The fourth proportional to 2,661,320.40, 3,991,980.60 and 978,205.20 is: 1,467,307.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661,320.40 : 3,991,980.60 = 978,205.20 : x
  2. Step 2: Convert to fraction form
    2,661,320.40/3,991,980.60 = 978,205.20/x
  3. Step 3: Cross multiply
    2,661,320.40x = 3,991,980.60 × 978,205.20
  4. Step 4: Simplify right side
    2,661,320.40x = 3,904,976,181,219.12
  5. Step 5: Solve for x
    x = 3,904,976,181,219.12/2,661,320.40
  6. Step 6: Final answer
    x = 1,467,307.80

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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.