Home / 1,989.27-2,983.86-528.38

Finding the Fourth Proportional to 1,989.27, 2,983.86 and 528.38

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Solution

The fourth proportional to 1,989.27, 2,983.86 and 528.38 is: 792.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.27 : 2,983.86 = 528.38 : x
  2. Step 2: Convert to fraction form
    1,989.27/2,983.86 = 528.38/x
  3. Step 3: Cross multiply
    1,989.27x = 2,983.86 × 528.38
  4. Step 4: Simplify right side
    1,989.27x = 1,576,597.03
  5. Step 5: Solve for x
    x = 1,576,597.03/1,989.27
  6. Step 6: Final answer
    x = 792.55

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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.