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Finding the Fourth Proportional to 1,821,166.80, 2,732,515.65 and 978,734.40

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Solution

The fourth proportional to 1,821,166.80, 2,732,515.65 and 978,734.40 is: 1,468,512.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821,166.80 : 2,732,515.65 = 978,734.40 : x
  2. Step 2: Convert to fraction form
    1,821,166.80/2,732,515.65 = 978,734.40/x
  3. Step 3: Cross multiply
    1,821,166.80x = 2,732,515.65 × 978,734.40
  4. Step 4: Simplify right side
    1,821,166.80x = 2,674,407,065,193.36
  5. Step 5: Solve for x
    x = 2,674,407,065,193.36/1,821,166.80
  6. Step 6: Final answer
    x = 1,468,512.97

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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.