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Finding the Fourth Proportional to 474.20, 711.30 and 185.45

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Solution

The fourth proportional to 474.20, 711.30 and 185.45 is: 278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.20 : 711.30 = 185.45 : x
  2. Step 2: Convert to fraction form
    474.20/711.30 = 185.45/x
  3. Step 3: Cross multiply
    474.20x = 711.30 × 185.45
  4. Step 4: Simplify right side
    474.20x = 131,910.59
  5. Step 5: Solve for x
    x = 131,910.59/474.20
  6. Step 6: Final answer
    x = 278.18

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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.