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Finding the Fourth Proportional to 1,964,209.64, 2,945,455.56 and 990,975.20

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Solution

The fourth proportional to 1,964,209.64, 2,945,455.56 and 990,975.20 is: 1,486,029.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964,209.64 : 2,945,455.56 = 990,975.20 : x
  2. Step 2: Convert to fraction form
    1,964,209.64/2,945,455.56 = 990,975.20/x
  3. Step 3: Cross multiply
    1,964,209.64x = 2,945,455.56 × 990,975.20
  4. Step 4: Simplify right side
    1,964,209.64x = 2,918,873,412,662.11
  5. Step 5: Solve for x
    x = 2,918,873,412,662.11/1,964,209.64
  6. Step 6: Final answer
    x = 1,486,029.47

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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.