Home / 1,087.72-1,629.05-538.13

Finding the Fourth Proportional to 1,087.72, 1,629.05 and 538.13

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Solution

The fourth proportional to 1,087.72, 1,629.05 and 538.13 is: 805.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.72 : 1,629.05 = 538.13 : x
  2. Step 2: Convert to fraction form
    1,087.72/1,629.05 = 538.13/x
  3. Step 3: Cross multiply
    1,087.72x = 1,629.05 × 538.13
  4. Step 4: Simplify right side
    1,087.72x = 876,642.06
  5. Step 5: Solve for x
    x = 876,642.06/1,087.72
  6. Step 6: Final answer
    x = 805.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.