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Finding the Fourth Proportional to 7,278.75, 10,917.20 and 2,347.88

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Solution

The fourth proportional to 7,278.75, 10,917.20 and 2,347.88 is: 3,521.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.75 : 10,917.20 = 2,347.88 : x
  2. Step 2: Convert to fraction form
    7,278.75/10,917.20 = 2,347.88/x
  3. Step 3: Cross multiply
    7,278.75x = 10,917.20 × 2,347.88
  4. Step 4: Simplify right side
    7,278.75x = 25,632,209.21
  5. Step 5: Solve for x
    x = 25,632,209.21/7,278.75
  6. Step 6: Final answer
    x = 3,521.51

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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.