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Finding the Fourth Proportional to 1,425.97, 2,138.72 and 548.07

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Solution

The fourth proportional to 1,425.97, 2,138.72 and 548.07 is: 822.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.97 : 2,138.72 = 548.07 : x
  2. Step 2: Convert to fraction form
    1,425.97/2,138.72 = 548.07/x
  3. Step 3: Cross multiply
    1,425.97x = 2,138.72 × 548.07
  4. Step 4: Simplify right side
    1,425.97x = 1,172,168.27
  5. Step 5: Solve for x
    x = 1,172,168.27/1,425.97
  6. Step 6: Final answer
    x = 822.01

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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.