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Finding the Fourth Proportional to 932.92, 1,286.69 and 618.23

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Solution

The fourth proportional to 932.92, 1,286.69 and 618.23 is: 852.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.92 : 1,286.69 = 618.23 : x
  2. Step 2: Convert to fraction form
    932.92/1,286.69 = 618.23/x
  3. Step 3: Cross multiply
    932.92x = 1,286.69 × 618.23
  4. Step 4: Simplify right side
    932.92x = 795,470.48
  5. Step 5: Solve for x
    x = 795,470.48/932.92
  6. Step 6: Final answer
    x = 852.67

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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.