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Finding the Fourth Proportional to 1,818.92, 2,509.46 and 1,189.81

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Solution

The fourth proportional to 1,818.92, 2,509.46 and 1,189.81 is: 1,641.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.92 : 2,509.46 = 1,189.81 : x
  2. Step 2: Convert to fraction form
    1,818.92/2,509.46 = 1,189.81/x
  3. Step 3: Cross multiply
    1,818.92x = 2,509.46 × 1,189.81
  4. Step 4: Simplify right side
    1,818.92x = 2,985,782.25
  5. Step 5: Solve for x
    x = 2,985,782.25/1,818.92
  6. Step 6: Final answer
    x = 1,641.51

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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.