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Finding the Fourth Proportional to 474.13, 711.20 and 185.57

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Solution

The fourth proportional to 474.13, 711.20 and 185.57 is: 278.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.13 : 711.20 = 185.57 : x
  2. Step 2: Convert to fraction form
    474.13/711.20 = 185.57/x
  3. Step 3: Cross multiply
    474.13x = 711.20 × 185.57
  4. Step 4: Simplify right side
    474.13x = 131,977.38
  5. Step 5: Solve for x
    x = 131,977.38/474.13
  6. Step 6: Final answer
    x = 278.36

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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.