Home / 1,221.26-1,823.01-1,131.02

Finding the Fourth Proportional to 1,221.26, 1,823.01 and 1,131.02

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Solution

The fourth proportional to 1,221.26, 1,823.01 and 1,131.02 is: 1,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.26 : 1,823.01 = 1,131.02 : x
  2. Step 2: Convert to fraction form
    1,221.26/1,823.01 = 1,131.02/x
  3. Step 3: Cross multiply
    1,221.26x = 1,823.01 × 1,131.02
  4. Step 4: Simplify right side
    1,221.26x = 2,061,855.12
  5. Step 5: Solve for x
    x = 2,061,855.12/1,221.26
  6. Step 6: Final answer
    x = 1,688.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.