Home / 1,214.92-1,675.47-1,028.80

Finding the Fourth Proportional to 1,214.92, 1,675.47 and 1,028.80

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Solution

The fourth proportional to 1,214.92, 1,675.47 and 1,028.80 is: 1,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.92 : 1,675.47 = 1,028.80 : x
  2. Step 2: Convert to fraction form
    1,214.92/1,675.47 = 1,028.80/x
  3. Step 3: Cross multiply
    1,214.92x = 1,675.47 × 1,028.80
  4. Step 4: Simplify right side
    1,214.92x = 1,723,723.54
  5. Step 5: Solve for x
    x = 1,723,723.54/1,214.92
  6. Step 6: Final answer
    x = 1,418.80

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1.5x scale

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.