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Finding the Fourth Proportional to 1,182.06, 1,629.93 and 809.22

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Solution

The fourth proportional to 1,182.06, 1,629.93 and 809.22 is: 1,115.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.06 : 1,629.93 = 809.22 : x
  2. Step 2: Convert to fraction form
    1,182.06/1,629.93 = 809.22/x
  3. Step 3: Cross multiply
    1,182.06x = 1,629.93 × 809.22
  4. Step 4: Simplify right side
    1,182.06x = 1,318,971.95
  5. Step 5: Solve for x
    x = 1,318,971.95/1,182.06
  6. Step 6: Final answer
    x = 1,115.82

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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.