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Finding the Fourth Proportional to 933.68, 1,286.76 and 875.22

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Solution

The fourth proportional to 933.68, 1,286.76 and 875.22 is: 1,206.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.68 : 1,286.76 = 875.22 : x
  2. Step 2: Convert to fraction form
    933.68/1,286.76 = 875.22/x
  3. Step 3: Cross multiply
    933.68x = 1,286.76 × 875.22
  4. Step 4: Simplify right side
    933.68x = 1,126,198.09
  5. Step 5: Solve for x
    x = 1,126,198.09/933.68
  6. Step 6: Final answer
    x = 1,206.19

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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.