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Finding the Fourth Proportional to 795.81, 1,192.20 and 621.66

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Solution

The fourth proportional to 795.81, 1,192.20 and 621.66 is: 931.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.81 : 1,192.20 = 621.66 : x
  2. Step 2: Convert to fraction form
    795.81/1,192.20 = 621.66/x
  3. Step 3: Cross multiply
    795.81x = 1,192.20 × 621.66
  4. Step 4: Simplify right side
    795.81x = 741,143.05
  5. Step 5: Solve for x
    x = 741,143.05/795.81
  6. Step 6: Final answer
    x = 931.31

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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.