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Finding the Fourth Proportional to 1,322.02, 1,811.15 and 1,272.78

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Solution

The fourth proportional to 1,322.02, 1,811.15 and 1,272.78 is: 1,743.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.02 : 1,811.15 = 1,272.78 : x
  2. Step 2: Convert to fraction form
    1,322.02/1,811.15 = 1,272.78/x
  3. Step 3: Cross multiply
    1,322.02x = 1,811.15 × 1,272.78
  4. Step 4: Simplify right side
    1,322.02x = 2,305,195.50
  5. Step 5: Solve for x
    x = 2,305,195.50/1,322.02
  6. Step 6: Final answer
    x = 1,743.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.