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Finding the Fourth Proportional to 927.11, 1,390.86 and 268.99

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Solution

The fourth proportional to 927.11, 1,390.86 and 268.99 is: 403.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.11 : 1,390.86 = 268.99 : x
  2. Step 2: Convert to fraction form
    927.11/1,390.86 = 268.99/x
  3. Step 3: Cross multiply
    927.11x = 1,390.86 × 268.99
  4. Step 4: Simplify right side
    927.11x = 374,120.48
  5. Step 5: Solve for x
    x = 374,120.48/927.11
  6. Step 6: Final answer
    x = 403.53

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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.