Home / 1,229.93-1,687.75-1,118.55

Finding the Fourth Proportional to 1,229.93, 1,687.75 and 1,118.55

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Solution

The fourth proportional to 1,229.93, 1,687.75 and 1,118.55 is: 1,534.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.93 : 1,687.75 = 1,118.55 : x
  2. Step 2: Convert to fraction form
    1,229.93/1,687.75 = 1,118.55/x
  3. Step 3: Cross multiply
    1,229.93x = 1,687.75 × 1,118.55
  4. Step 4: Simplify right side
    1,229.93x = 1,887,832.76
  5. Step 5: Solve for x
    x = 1,887,832.76/1,229.93
  6. Step 6: Final answer
    x = 1,534.91

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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.