Home / 1,192.12-1,643.49-1,175.72

Finding the Fourth Proportional to 1,192.12, 1,643.49 and 1,175.72

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Solution

The fourth proportional to 1,192.12, 1,643.49 and 1,175.72 is: 1,620.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.12 : 1,643.49 = 1,175.72 : x
  2. Step 2: Convert to fraction form
    1,192.12/1,643.49 = 1,175.72/x
  3. Step 3: Cross multiply
    1,192.12x = 1,643.49 × 1,175.72
  4. Step 4: Simplify right side
    1,192.12x = 1,932,275.85
  5. Step 5: Solve for x
    x = 1,932,275.85/1,192.12
  6. Step 6: Final answer
    x = 1,620.88

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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.