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Finding the Fourth Proportional to 472.17, 708.04 and 212.25

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Solution

The fourth proportional to 472.17, 708.04 and 212.25 is: 318.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.17 : 708.04 = 212.25 : x
  2. Step 2: Convert to fraction form
    472.17/708.04 = 212.25/x
  3. Step 3: Cross multiply
    472.17x = 708.04 × 212.25
  4. Step 4: Simplify right side
    472.17x = 150,281.49
  5. Step 5: Solve for x
    x = 150,281.49/472.17
  6. Step 6: Final answer
    x = 318.28

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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.