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Finding the Fourth Proportional to 472.56, 708.24 and 215.52

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Solution

The fourth proportional to 472.56, 708.24 and 215.52 is: 323.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.56 : 708.24 = 215.52 : x
  2. Step 2: Convert to fraction form
    472.56/708.24 = 215.52/x
  3. Step 3: Cross multiply
    472.56x = 708.24 × 215.52
  4. Step 4: Simplify right side
    472.56x = 152,639.88
  5. Step 5: Solve for x
    x = 152,639.88/472.56
  6. Step 6: Final answer
    x = 323.01

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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.