Home / 1,231,078.20-1,698,588.66-721,682.16

Finding the Fourth Proportional to 1,231,078.20, 1,698,588.66 and 721,682.16

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Solution

The fourth proportional to 1,231,078.20, 1,698,588.66 and 721,682.16 is: 995,745.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,078.20 : 1,698,588.66 = 721,682.16 : x
  2. Step 2: Convert to fraction form
    1,231,078.20/1,698,588.66 = 721,682.16/x
  3. Step 3: Cross multiply
    1,231,078.20x = 1,698,588.66 × 721,682.16
  4. Step 4: Simplify right side
    1,231,078.20x = 1,225,841,129,436.91
  5. Step 5: Solve for x
    x = 1,225,841,129,436.91/1,231,078.20
  6. Step 6: Final answer
    x = 995,745.95

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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.