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Finding the Fourth Proportional to 850.20, 1,175.51 and 776.39

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Solution

The fourth proportional to 850.20, 1,175.51 and 776.39 is: 1,073.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.20 : 1,175.51 = 776.39 : x
  2. Step 2: Convert to fraction form
    850.20/1,175.51 = 776.39/x
  3. Step 3: Cross multiply
    850.20x = 1,175.51 × 776.39
  4. Step 4: Simplify right side
    850.20x = 912,650.27
  5. Step 5: Solve for x
    x = 912,650.27/850.20
  6. Step 6: Final answer
    x = 1,073.46

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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.