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Finding the Fourth Proportional to 474.15, 711 and 149.34

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Solution

The fourth proportional to 474.15, 711 and 149.34 is: 223.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.15 : 711 = 149.34 : x
  2. Step 2: Convert to fraction form
    474.15/711 = 149.34/x
  3. Step 3: Cross multiply
    474.15x = 711 × 149.34
  4. Step 4: Simplify right side
    474.15x = 106,180.74
  5. Step 5: Solve for x
    x = 106,180.74/474.15
  6. Step 6: Final answer
    x = 223.94

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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.