Home / 1,233.12-1,856.64-1,087.79

Finding the Fourth Proportional to 1,233.12, 1,856.64 and 1,087.79

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Solution

The fourth proportional to 1,233.12, 1,856.64 and 1,087.79 is: 1,637.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.12 : 1,856.64 = 1,087.79 : x
  2. Step 2: Convert to fraction form
    1,233.12/1,856.64 = 1,087.79/x
  3. Step 3: Cross multiply
    1,233.12x = 1,856.64 × 1,087.79
  4. Step 4: Simplify right side
    1,233.12x = 2,019,625.14
  5. Step 5: Solve for x
    x = 2,019,625.14/1,233.12
  6. Step 6: Final answer
    x = 1,637.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.