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Finding the Fourth Proportional to 474.32, 711.72 and 218

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Solution

The fourth proportional to 474.32, 711.72 and 218 is: 327.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.32 : 711.72 = 218 : x
  2. Step 2: Convert to fraction form
    474.32/711.72 = 218/x
  3. Step 3: Cross multiply
    474.32x = 711.72 × 218
  4. Step 4: Simplify right side
    474.32x = 155,154.96
  5. Step 5: Solve for x
    x = 155,154.96/474.32
  6. Step 6: Final answer
    x = 327.11

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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.