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Finding the Fourth Proportional to 474.12, 711.21 and 149.50

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Solution

The fourth proportional to 474.12, 711.21 and 149.50 is: 224.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.12 : 711.21 = 149.50 : x
  2. Step 2: Convert to fraction form
    474.12/711.21 = 149.50/x
  3. Step 3: Cross multiply
    474.12x = 711.21 × 149.50
  4. Step 4: Simplify right side
    474.12x = 106,325.90
  5. Step 5: Solve for x
    x = 106,325.90/474.12
  6. Step 6: Final answer
    x = 224.26

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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.