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Finding the Fourth Proportional to 863.30, 1,192.20 and 738.23

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Solution

The fourth proportional to 863.30, 1,192.20 and 738.23 is: 1,019.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.30 : 1,192.20 = 738.23 : x
  2. Step 2: Convert to fraction form
    863.30/1,192.20 = 738.23/x
  3. Step 3: Cross multiply
    863.30x = 1,192.20 × 738.23
  4. Step 4: Simplify right side
    863.30x = 880,120.79
  5. Step 5: Solve for x
    x = 880,120.79/863.30
  6. Step 6: Final answer
    x = 1,019.48

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1.5x scale

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.