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Finding the Fourth Proportional to 2,052.78, 3,078.84 and 753.93

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Solution

The fourth proportional to 2,052.78, 3,078.84 and 753.93 is: 1,130.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,052.78 : 3,078.84 = 753.93 : x
  2. Step 2: Convert to fraction form
    2,052.78/3,078.84 = 753.93/x
  3. Step 3: Cross multiply
    2,052.78x = 3,078.84 × 753.93
  4. Step 4: Simplify right side
    2,052.78x = 2,321,229.84
  5. Step 5: Solve for x
    x = 2,321,229.84/2,052.78
  6. Step 6: Final answer
    x = 1,130.77

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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.