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Finding the Fourth Proportional to 851.33, 1,277.66 and 774.79

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Solution

The fourth proportional to 851.33, 1,277.66 and 774.79 is: 1,162.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.33 : 1,277.66 = 774.79 : x
  2. Step 2: Convert to fraction form
    851.33/1,277.66 = 774.79/x
  3. Step 3: Cross multiply
    851.33x = 1,277.66 × 774.79
  4. Step 4: Simplify right side
    851.33x = 989,918.19
  5. Step 5: Solve for x
    x = 989,918.19/851.33
  6. Step 6: Final answer
    x = 1,162.79

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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.