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Finding the Fourth Proportional to 474.28, 711.42 and 181.91

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Solution

The fourth proportional to 474.28, 711.42 and 181.91 is: 272.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.28 : 711.42 = 181.91 : x
  2. Step 2: Convert to fraction form
    474.28/711.42 = 181.91/x
  3. Step 3: Cross multiply
    474.28x = 711.42 × 181.91
  4. Step 4: Simplify right side
    474.28x = 129,413.96
  5. Step 5: Solve for x
    x = 129,413.96/474.28
  6. Step 6: Final answer
    x = 272.87

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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.