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Finding the Fourth Proportional to 2,335.96, 3,223.62 and 1,288

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Solution

The fourth proportional to 2,335.96, 3,223.62 and 1,288 is: 1,777.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,335.96 : 3,223.62 = 1,288 : x
  2. Step 2: Convert to fraction form
    2,335.96/3,223.62 = 1,288/x
  3. Step 3: Cross multiply
    2,335.96x = 3,223.62 × 1,288
  4. Step 4: Simplify right side
    2,335.96x = 4,152,022.56
  5. Step 5: Solve for x
    x = 4,152,022.56/2,335.96
  6. Step 6: Final answer
    x = 1,777.44

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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.