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Finding the Fourth Proportional to 928.81, 1,393.76 and 344.22

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Solution

The fourth proportional to 928.81, 1,393.76 and 344.22 is: 516.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.81 : 1,393.76 = 344.22 : x
  2. Step 2: Convert to fraction form
    928.81/1,393.76 = 344.22/x
  3. Step 3: Cross multiply
    928.81x = 1,393.76 × 344.22
  4. Step 4: Simplify right side
    928.81x = 479,760.93
  5. Step 5: Solve for x
    x = 479,760.93/928.81
  6. Step 6: Final answer
    x = 516.53

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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.