Home / 1,291.29-1,780.86-1,160.73

Finding the Fourth Proportional to 1,291.29, 1,780.86 and 1,160.73

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Solution

The fourth proportional to 1,291.29, 1,780.86 and 1,160.73 is: 1,600.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.29 : 1,780.86 = 1,160.73 : x
  2. Step 2: Convert to fraction form
    1,291.29/1,780.86 = 1,160.73/x
  3. Step 3: Cross multiply
    1,291.29x = 1,780.86 × 1,160.73
  4. Step 4: Simplify right side
    1,291.29x = 2,067,097.63
  5. Step 5: Solve for x
    x = 2,067,097.63/1,291.29
  6. Step 6: Final answer
    x = 1,600.80

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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.