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Finding the Fourth Proportional to 3,518.72, 5,278.68 and 1,327.76

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Solution

The fourth proportional to 3,518.72, 5,278.68 and 1,327.76 is: 1,991.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.72 : 5,278.68 = 1,327.76 : x
  2. Step 2: Convert to fraction form
    3,518.72/5,278.68 = 1,327.76/x
  3. Step 3: Cross multiply
    3,518.72x = 5,278.68 × 1,327.76
  4. Step 4: Simplify right side
    3,518.72x = 7,008,820.16
  5. Step 5: Solve for x
    x = 7,008,820.16/3,518.72
  6. Step 6: Final answer
    x = 1,991.87

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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.