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Finding the Fourth Proportional to 472.81, 709.34 and 216.25

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Solution

The fourth proportional to 472.81, 709.34 and 216.25 is: 324.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.81 : 709.34 = 216.25 : x
  2. Step 2: Convert to fraction form
    472.81/709.34 = 216.25/x
  3. Step 3: Cross multiply
    472.81x = 709.34 × 216.25
  4. Step 4: Simplify right side
    472.81x = 153,394.78
  5. Step 5: Solve for x
    x = 153,394.78/472.81
  6. Step 6: Final answer
    x = 324.43

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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.