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Finding the Fourth Proportional to 5,274.40, 7,907.60 and 2,679.20

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Solution

The fourth proportional to 5,274.40, 7,907.60 and 2,679.20 is: 4,016.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,274.40 : 7,907.60 = 2,679.20 : x
  2. Step 2: Convert to fraction form
    5,274.40/7,907.60 = 2,679.20/x
  3. Step 3: Cross multiply
    5,274.40x = 7,907.60 × 2,679.20
  4. Step 4: Simplify right side
    5,274.40x = 21,186,041.92
  5. Step 5: Solve for x
    x = 21,186,041.92/5,274.40
  6. Step 6: Final answer
    x = 4,016.77

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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.