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Finding the Fourth Proportional to 5,105, 7,659.32 and 2,509.76

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Solution

The fourth proportional to 5,105, 7,659.32 and 2,509.76 is: 3,765.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105 : 7,659.32 = 2,509.76 : x
  2. Step 2: Convert to fraction form
    5,105/7,659.32 = 2,509.76/x
  3. Step 3: Cross multiply
    5,105x = 7,659.32 × 2,509.76
  4. Step 4: Simplify right side
    5,105x = 19,223,054.96
  5. Step 5: Solve for x
    x = 19,223,054.96/5,105
  6. Step 6: Final answer
    x = 3,765.53

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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.