Home / 1,139,249.90-1,707,380-838,321.40

Finding the Fourth Proportional to 1,139,249.90, 1,707,380 and 838,321.40

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Solution

The fourth proportional to 1,139,249.90, 1,707,380 and 838,321.40 is: 1,256,382.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,249.90 : 1,707,380 = 838,321.40 : x
  2. Step 2: Convert to fraction form
    1,139,249.90/1,707,380 = 838,321.40/x
  3. Step 3: Cross multiply
    1,139,249.90x = 1,707,380 × 838,321.40
  4. Step 4: Simplify right side
    1,139,249.90x = 1,431,333,191,932
  5. Step 5: Solve for x
    x = 1,431,333,191,932/1,139,249.90
  6. Step 6: Final answer
    x = 1,256,382.11

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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.