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Finding the Fourth Proportional to 1,422,161.22, 1,962,582.66 and 777,581.86

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Solution

The fourth proportional to 1,422,161.22, 1,962,582.66 and 777,581.86 is: 1,073,063.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422,161.22 : 1,962,582.66 = 777,581.86 : x
  2. Step 2: Convert to fraction form
    1,422,161.22/1,962,582.66 = 777,581.86/x
  3. Step 3: Cross multiply
    1,422,161.22x = 1,962,582.66 × 777,581.86
  4. Step 4: Simplify right side
    1,422,161.22x = 1,526,068,675,166.55
  5. Step 5: Solve for x
    x = 1,526,068,675,166.55/1,422,161.22
  6. Step 6: Final answer
    x = 1,073,063.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.