Home / 3,151.20-4,726.69-811.11

Finding the Fourth Proportional to 3,151.20, 4,726.69 and 811.11

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Solution

The fourth proportional to 3,151.20, 4,726.69 and 811.11 is: 1,216.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,151.20 : 4,726.69 = 811.11 : x
  2. Step 2: Convert to fraction form
    3,151.20/4,726.69 = 811.11/x
  3. Step 3: Cross multiply
    3,151.20x = 4,726.69 × 811.11
  4. Step 4: Simplify right side
    3,151.20x = 3,833,865.53
  5. Step 5: Solve for x
    x = 3,833,865.53/3,151.20
  6. Step 6: Final answer
    x = 1,216.64

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1.5x scale

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.