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Finding the Fourth Proportional to 1,990,895.80, 2,986,727.70 and 853,641.40

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Solution

The fourth proportional to 1,990,895.80, 2,986,727.70 and 853,641.40 is: 1,280,626.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,895.80 : 2,986,727.70 = 853,641.40 : x
  2. Step 2: Convert to fraction form
    1,990,895.80/2,986,727.70 = 853,641.40/x
  3. Step 3: Cross multiply
    1,990,895.80x = 2,986,727.70 × 853,641.40
  4. Step 4: Simplify right side
    1,990,895.80x = 2,549,594,415,246.78
  5. Step 5: Solve for x
    x = 2,549,594,415,246.78/1,990,895.80
  6. Step 6: Final answer
    x = 1,280,626.75

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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.