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Finding the Fourth Proportional to 850.91, 1,275.66 and 711.77

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Solution

The fourth proportional to 850.91, 1,275.66 and 711.77 is: 1,067.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.91 : 1,275.66 = 711.77 : x
  2. Step 2: Convert to fraction form
    850.91/1,275.66 = 711.77/x
  3. Step 3: Cross multiply
    850.91x = 1,275.66 × 711.77
  4. Step 4: Simplify right side
    850.91x = 907,970.14
  5. Step 5: Solve for x
    x = 907,970.14/850.91
  6. Step 6: Final answer
    x = 1,067.06

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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.