Home / 2,661,287.40-3,991,931.10-978,172.20

Finding the Fourth Proportional to 2,661,287.40, 3,991,931.10 and 978,172.20

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Solution

The fourth proportional to 2,661,287.40, 3,991,931.10 and 978,172.20 is: 1,467,258.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661,287.40 : 3,991,931.10 = 978,172.20 : x
  2. Step 2: Convert to fraction form
    2,661,287.40/3,991,931.10 = 978,172.20/x
  3. Step 3: Cross multiply
    2,661,287.40x = 3,991,931.10 × 978,172.20
  4. Step 4: Simplify right side
    2,661,287.40x = 3,904,796,026,335.42
  5. Step 5: Solve for x
    x = 3,904,796,026,335.42/2,661,287.40
  6. Step 6: Final answer
    x = 1,467,258.30

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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.