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Finding the Fourth Proportional to 661.74, 913.28 and 374.33

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Solution

The fourth proportional to 661.74, 913.28 and 374.33 is: 516.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.74 : 913.28 = 374.33 : x
  2. Step 2: Convert to fraction form
    661.74/913.28 = 374.33/x
  3. Step 3: Cross multiply
    661.74x = 913.28 × 374.33
  4. Step 4: Simplify right side
    661.74x = 341,861.66
  5. Step 5: Solve for x
    x = 341,861.66/661.74
  6. Step 6: Final answer
    x = 516.61

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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.