Home / 1,272.19-1,910.79-1,217.51

Finding the Fourth Proportional to 1,272.19, 1,910.79 and 1,217.51

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Solution

The fourth proportional to 1,272.19, 1,910.79 and 1,217.51 is: 1,828.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.19 : 1,910.79 = 1,217.51 : x
  2. Step 2: Convert to fraction form
    1,272.19/1,910.79 = 1,217.51/x
  3. Step 3: Cross multiply
    1,272.19x = 1,910.79 × 1,217.51
  4. Step 4: Simplify right side
    1,272.19x = 2,326,405.93
  5. Step 5: Solve for x
    x = 2,326,405.93/1,272.19
  6. Step 6: Final answer
    x = 1,828.66

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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.