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Finding the Fourth Proportional to 2,891.02, 4,336.20 and 811.19

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Solution

The fourth proportional to 2,891.02, 4,336.20 and 811.19 is: 1,216.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.02 : 4,336.20 = 811.19 : x
  2. Step 2: Convert to fraction form
    2,891.02/4,336.20 = 811.19/x
  3. Step 3: Cross multiply
    2,891.02x = 4,336.20 × 811.19
  4. Step 4: Simplify right side
    2,891.02x = 3,517,482.08
  5. Step 5: Solve for x
    x = 3,517,482.08/2,891.02
  6. Step 6: Final answer
    x = 1,216.69

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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.