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Finding the Fourth Proportional to 853.76, 1,175.37 and 766.28

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Solution

The fourth proportional to 853.76, 1,175.37 and 766.28 is: 1,054.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.76 : 1,175.37 = 766.28 : x
  2. Step 2: Convert to fraction form
    853.76/1,175.37 = 766.28/x
  3. Step 3: Cross multiply
    853.76x = 1,175.37 × 766.28
  4. Step 4: Simplify right side
    853.76x = 900,662.52
  5. Step 5: Solve for x
    x = 900,662.52/853.76
  6. Step 6: Final answer
    x = 1,054.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.