Home / 2,213.60-3,319.64-981.87

Finding the Fourth Proportional to 2,213.60, 3,319.64 and 981.87

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Solution

The fourth proportional to 2,213.60, 3,319.64 and 981.87 is: 1,472.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.60 : 3,319.64 = 981.87 : x
  2. Step 2: Convert to fraction form
    2,213.60/3,319.64 = 981.87/x
  3. Step 3: Cross multiply
    2,213.60x = 3,319.64 × 981.87
  4. Step 4: Simplify right side
    2,213.60x = 3,259,450.02
  5. Step 5: Solve for x
    x = 3,259,450.02/2,213.60
  6. Step 6: Final answer
    x = 1,472.47

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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.