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Finding the Fourth Proportional to 2,039.81, 3,059.92 and 652.80

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Solution

The fourth proportional to 2,039.81, 3,059.92 and 652.80 is: 979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.81 : 3,059.92 = 652.80 : x
  2. Step 2: Convert to fraction form
    2,039.81/3,059.92 = 652.80/x
  3. Step 3: Cross multiply
    2,039.81x = 3,059.92 × 652.80
  4. Step 4: Simplify right side
    2,039.81x = 1,997,497.21
  5. Step 5: Solve for x
    x = 1,997,497.21/2,039.81
  6. Step 6: Final answer
    x = 979.26

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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.