Home / 2,790.70-3,851.09-1,531.76

Finding the Fourth Proportional to 2,790.70, 3,851.09 and 1,531.76

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Solution

The fourth proportional to 2,790.70, 3,851.09 and 1,531.76 is: 2,113.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.70 : 3,851.09 = 1,531.76 : x
  2. Step 2: Convert to fraction form
    2,790.70/3,851.09 = 1,531.76/x
  3. Step 3: Cross multiply
    2,790.70x = 3,851.09 × 1,531.76
  4. Step 4: Simplify right side
    2,790.70x = 5,898,954.73
  5. Step 5: Solve for x
    x = 5,898,954.73/2,790.70
  6. Step 6: Final answer
    x = 2,113.79

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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.