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Finding the Fourth Proportional to 1,067.56, 1,601.70 and 547.78

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Solution

The fourth proportional to 1,067.56, 1,601.70 and 547.78 is: 821.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.56 : 1,601.70 = 547.78 : x
  2. Step 2: Convert to fraction form
    1,067.56/1,601.70 = 547.78/x
  3. Step 3: Cross multiply
    1,067.56x = 1,601.70 × 547.78
  4. Step 4: Simplify right side
    1,067.56x = 877,379.23
  5. Step 5: Solve for x
    x = 877,379.23/1,067.56
  6. Step 6: Final answer
    x = 821.85

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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.