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Finding the Fourth Proportional to 2,087.56, 3,131.28 and 548.56

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Solution

The fourth proportional to 2,087.56, 3,131.28 and 548.56 is: 822.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.56 : 3,131.28 = 548.56 : x
  2. Step 2: Convert to fraction form
    2,087.56/3,131.28 = 548.56/x
  3. Step 3: Cross multiply
    2,087.56x = 3,131.28 × 548.56
  4. Step 4: Simplify right side
    2,087.56x = 1,717,694.96
  5. Step 5: Solve for x
    x = 1,717,694.96/2,087.56
  6. Step 6: Final answer
    x = 822.82

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1.5x scale

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.