Home / 1,990,420.80-2,986,322.40-869,294.40

Finding the Fourth Proportional to 1,990,420.80, 2,986,322.40 and 869,294.40

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Solution

The fourth proportional to 1,990,420.80, 2,986,322.40 and 869,294.40 is: 1,304,243.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,420.80 : 2,986,322.40 = 869,294.40 : x
  2. Step 2: Convert to fraction form
    1,990,420.80/2,986,322.40 = 869,294.40/x
  3. Step 3: Cross multiply
    1,990,420.80x = 2,986,322.40 × 869,294.40
  4. Step 4: Simplify right side
    1,990,420.80x = 2,595,993,338,914.56
  5. Step 5: Solve for x
    x = 2,595,993,338,914.56/1,990,420.80
  6. Step 6: Final answer
    x = 1,304,243.47

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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.