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Finding the Fourth Proportional to 2,135.92, 3,203.80 and 1,508.64

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Solution

The fourth proportional to 2,135.92, 3,203.80 and 1,508.64 is: 2,262.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.92 : 3,203.80 = 1,508.64 : x
  2. Step 2: Convert to fraction form
    2,135.92/3,203.80 = 1,508.64/x
  3. Step 3: Cross multiply
    2,135.92x = 3,203.80 × 1,508.64
  4. Step 4: Simplify right side
    2,135.92x = 4,833,380.83
  5. Step 5: Solve for x
    x = 4,833,380.83/2,135.92
  6. Step 6: Final answer
    x = 2,262.90

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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.