Home / 1,395.24-2,091.12-1,221.49

Finding the Fourth Proportional to 1,395.24, 2,091.12 and 1,221.49

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Solution

The fourth proportional to 1,395.24, 2,091.12 and 1,221.49 is: 1,830.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.24 : 2,091.12 = 1,221.49 : x
  2. Step 2: Convert to fraction form
    1,395.24/2,091.12 = 1,221.49/x
  3. Step 3: Cross multiply
    1,395.24x = 2,091.12 × 1,221.49
  4. Step 4: Simplify right side
    1,395.24x = 2,554,282.17
  5. Step 5: Solve for x
    x = 2,554,282.17/1,395.24
  6. Step 6: Final answer
    x = 1,830.71

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1.5x scale

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.