Home / 1,989.22-2,983.60-528.49

Finding the Fourth Proportional to 1,989.22, 2,983.60 and 528.49

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Solution

The fourth proportional to 1,989.22, 2,983.60 and 528.49 is: 792.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.22 : 2,983.60 = 528.49 : x
  2. Step 2: Convert to fraction form
    1,989.22/2,983.60 = 528.49/x
  3. Step 3: Cross multiply
    1,989.22x = 2,983.60 × 528.49
  4. Step 4: Simplify right side
    1,989.22x = 1,576,795.97
  5. Step 5: Solve for x
    x = 1,576,795.97/1,989.22
  6. Step 6: Final answer
    x = 792.67

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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.