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Finding the Fourth Proportional to 805.41, 1,208.79 and 767.07

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Solution

The fourth proportional to 805.41, 1,208.79 and 767.07 is: 1,151.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.41 : 1,208.79 = 767.07 : x
  2. Step 2: Convert to fraction form
    805.41/1,208.79 = 767.07/x
  3. Step 3: Cross multiply
    805.41x = 1,208.79 × 767.07
  4. Step 4: Simplify right side
    805.41x = 927,226.55
  5. Step 5: Solve for x
    x = 927,226.55/805.41
  6. Step 6: Final answer
    x = 1,151.25

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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.