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Finding the Fourth Proportional to 795.77, 1,192.62 and 641.76

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Solution

The fourth proportional to 795.77, 1,192.62 and 641.76 is: 961.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.77 : 1,192.62 = 641.76 : x
  2. Step 2: Convert to fraction form
    795.77/1,192.62 = 641.76/x
  3. Step 3: Cross multiply
    795.77x = 1,192.62 × 641.76
  4. Step 4: Simplify right side
    795.77x = 765,375.81
  5. Step 5: Solve for x
    x = 765,375.81/795.77
  6. Step 6: Final answer
    x = 961.81

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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.