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Finding the Fourth Proportional to 863.55, 1,192.54 and 738.49

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Solution

The fourth proportional to 863.55, 1,192.54 and 738.49 is: 1,019.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.55 : 1,192.54 = 738.49 : x
  2. Step 2: Convert to fraction form
    863.55/1,192.54 = 738.49/x
  3. Step 3: Cross multiply
    863.55x = 1,192.54 × 738.49
  4. Step 4: Simplify right side
    863.55x = 880,672.90
  5. Step 5: Solve for x
    x = 880,672.90/863.55
  6. Step 6: Final answer
    x = 1,019.83

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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.