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Finding the Fourth Proportional to 1,803.71, 2,707.27 and 1,187.81

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Solution

The fourth proportional to 1,803.71, 2,707.27 and 1,187.81 is: 1,782.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.71 : 2,707.27 = 1,187.81 : x
  2. Step 2: Convert to fraction form
    1,803.71/2,707.27 = 1,187.81/x
  3. Step 3: Cross multiply
    1,803.71x = 2,707.27 × 1,187.81
  4. Step 4: Simplify right side
    1,803.71x = 3,215,730.42
  5. Step 5: Solve for x
    x = 3,215,730.42/1,803.71
  6. Step 6: Final answer
    x = 1,782.85

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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.