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Finding the Fourth Proportional to 927.76, 1,391.22 and 350.56

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Solution

The fourth proportional to 927.76, 1,391.22 and 350.56 is: 525.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.76 : 1,391.22 = 350.56 : x
  2. Step 2: Convert to fraction form
    927.76/1,391.22 = 350.56/x
  3. Step 3: Cross multiply
    927.76x = 1,391.22 × 350.56
  4. Step 4: Simplify right side
    927.76x = 487,706.08
  5. Step 5: Solve for x
    x = 487,706.08/927.76
  6. Step 6: Final answer
    x = 525.68

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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.