Home / 1,385.34-2,067.87-1,221.32

Finding the Fourth Proportional to 1,385.34, 2,067.87 and 1,221.32

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Solution

The fourth proportional to 1,385.34, 2,067.87 and 1,221.32 is: 1,823.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.34 : 2,067.87 = 1,221.32 : x
  2. Step 2: Convert to fraction form
    1,385.34/2,067.87 = 1,221.32/x
  3. Step 3: Cross multiply
    1,385.34x = 2,067.87 × 1,221.32
  4. Step 4: Simplify right side
    1,385.34x = 2,525,530.99
  5. Step 5: Solve for x
    x = 2,525,530.99/1,385.34
  6. Step 6: Final answer
    x = 1,823.04

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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.