Home / 1,246.11-1,867.77-515.31

Finding the Fourth Proportional to 1,246.11, 1,867.77 and 515.31

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Solution

The fourth proportional to 1,246.11, 1,867.77 and 515.31 is: 772.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.11 : 1,867.77 = 515.31 : x
  2. Step 2: Convert to fraction form
    1,246.11/1,867.77 = 515.31/x
  3. Step 3: Cross multiply
    1,246.11x = 1,867.77 × 515.31
  4. Step 4: Simplify right side
    1,246.11x = 962,480.56
  5. Step 5: Solve for x
    x = 962,480.56/1,246.11
  6. Step 6: Final answer
    x = 772.39

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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.