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Finding the Fourth Proportional to 1,288,671, 1,778,261.88 and 744,842

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Solution

The fourth proportional to 1,288,671, 1,778,261.88 and 744,842 is: 1,027,821.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,671 : 1,778,261.88 = 744,842 : x
  2. Step 2: Convert to fraction form
    1,288,671/1,778,261.88 = 744,842/x
  3. Step 3: Cross multiply
    1,288,671x = 1,778,261.88 × 744,842
  4. Step 4: Simplify right side
    1,288,671x = 1,324,524,135,222.96
  5. Step 5: Solve for x
    x = 1,324,524,135,222.96/1,288,671
  6. Step 6: Final answer
    x = 1,027,821.79

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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.