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Finding the Fourth Proportional to 1,425.31, 2,137.62 and 547.48

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Solution

The fourth proportional to 1,425.31, 2,137.62 and 547.48 is: 821.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.31 : 2,137.62 = 547.48 : x
  2. Step 2: Convert to fraction form
    1,425.31/2,137.62 = 547.48/x
  3. Step 3: Cross multiply
    1,425.31x = 2,137.62 × 547.48
  4. Step 4: Simplify right side
    1,425.31x = 1,170,304.20
  5. Step 5: Solve for x
    x = 1,170,304.20/1,425.31
  6. Step 6: Final answer
    x = 821.09

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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.