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Finding the Fourth Proportional to 5,339.76, 7,998.90 and 2,663.28

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Solution

The fourth proportional to 5,339.76, 7,998.90 and 2,663.28 is: 3,989.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,339.76 : 7,998.90 = 2,663.28 : x
  2. Step 2: Convert to fraction form
    5,339.76/7,998.90 = 2,663.28/x
  3. Step 3: Cross multiply
    5,339.76x = 7,998.90 × 2,663.28
  4. Step 4: Simplify right side
    5,339.76x = 21,303,310.39
  5. Step 5: Solve for x
    x = 21,303,310.39/5,339.76
  6. Step 6: Final answer
    x = 3,989.56

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1.5x scale

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.