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Finding the Fourth Proportional to 2,803.59, 3,866.81 and 1,808.28

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Solution

The fourth proportional to 2,803.59, 3,866.81 and 1,808.28 is: 2,494.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,803.59 : 3,866.81 = 1,808.28 : x
  2. Step 2: Convert to fraction form
    2,803.59/3,866.81 = 1,808.28/x
  3. Step 3: Cross multiply
    2,803.59x = 3,866.81 × 1,808.28
  4. Step 4: Simplify right side
    2,803.59x = 6,992,266.15
  5. Step 5: Solve for x
    x = 6,992,266.15/2,803.59
  6. Step 6: Final answer
    x = 2,494.04

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1.5x scale

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.