Home / 1,221.57-1,836.41-1,131.35

Finding the Fourth Proportional to 1,221.57, 1,836.41 and 1,131.35

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Solution

The fourth proportional to 1,221.57, 1,836.41 and 1,131.35 is: 1,700.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.57 : 1,836.41 = 1,131.35 : x
  2. Step 2: Convert to fraction form
    1,221.57/1,836.41 = 1,131.35/x
  3. Step 3: Cross multiply
    1,221.57x = 1,836.41 × 1,131.35
  4. Step 4: Simplify right side
    1,221.57x = 2,077,607.61
  5. Step 5: Solve for x
    x = 2,077,607.61/1,221.57
  6. Step 6: Final answer
    x = 1,700.77

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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.