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Finding the Fourth Proportional to 863.37, 1,292.65 and 738.81

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Solution

The fourth proportional to 863.37, 1,292.65 and 738.81 is: 1,106.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.37 : 1,292.65 = 738.81 : x
  2. Step 2: Convert to fraction form
    863.37/1,292.65 = 738.81/x
  3. Step 3: Cross multiply
    863.37x = 1,292.65 × 738.81
  4. Step 4: Simplify right side
    863.37x = 955,022.75
  5. Step 5: Solve for x
    x = 955,022.75/863.37
  6. Step 6: Final answer
    x = 1,106.16

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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.