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Finding the Fourth Proportional to 1,067.70, 1,601.55 and 885.30

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Solution

The fourth proportional to 1,067.70, 1,601.55 and 885.30 is: 1,327.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.70 : 1,601.55 = 885.30 : x
  2. Step 2: Convert to fraction form
    1,067.70/1,601.55 = 885.30/x
  3. Step 3: Cross multiply
    1,067.70x = 1,601.55 × 885.30
  4. Step 4: Simplify right side
    1,067.70x = 1,417,852.22
  5. Step 5: Solve for x
    x = 1,417,852.22/1,067.70
  6. Step 6: Final answer
    x = 1,327.95

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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.