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Finding the Fourth Proportional to 2,052.06, 3,076.43 and 645.76

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Solution

The fourth proportional to 2,052.06, 3,076.43 and 645.76 is: 968.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,052.06 : 3,076.43 = 645.76 : x
  2. Step 2: Convert to fraction form
    2,052.06/3,076.43 = 645.76/x
  3. Step 3: Cross multiply
    2,052.06x = 3,076.43 × 645.76
  4. Step 4: Simplify right side
    2,052.06x = 1,986,635.44
  5. Step 5: Solve for x
    x = 1,986,635.44/2,052.06
  6. Step 6: Final answer
    x = 968.12

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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.