Home / 1,246.19-1,867.80-515.57

Finding the Fourth Proportional to 1,246.19, 1,867.80 and 515.57

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Solution

The fourth proportional to 1,246.19, 1,867.80 and 515.57 is: 772.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.19 : 1,867.80 = 515.57 : x
  2. Step 2: Convert to fraction form
    1,246.19/1,867.80 = 515.57/x
  3. Step 3: Cross multiply
    1,246.19x = 1,867.80 × 515.57
  4. Step 4: Simplify right side
    1,246.19x = 962,981.65
  5. Step 5: Solve for x
    x = 962,981.65/1,246.19
  6. Step 6: Final answer
    x = 772.74

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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.