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Finding the Fourth Proportional to 3,889,807.80, 5,832,087.30 and 1,869,019.80

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Solution

The fourth proportional to 3,889,807.80, 5,832,087.30 and 1,869,019.80 is: 2,802,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889,807.80 : 5,832,087.30 = 1,869,019.80 : x
  2. Step 2: Convert to fraction form
    3,889,807.80/5,832,087.30 = 1,869,019.80/x
  3. Step 3: Cross multiply
    3,889,807.80x = 5,832,087.30 × 1,869,019.80
  4. Step 4: Simplify right side
    3,889,807.80x = 10,900,286,639,028.54
  5. Step 5: Solve for x
    x = 10,900,286,639,028.54/3,889,807.80
  6. Step 6: Final answer
    x = 2,802,268.70

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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.