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Finding the Fourth Proportional to 645.15, 968.22 and 472.27

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Solution

The fourth proportional to 645.15, 968.22 and 472.27 is: 708.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.15 : 968.22 = 472.27 : x
  2. Step 2: Convert to fraction form
    645.15/968.22 = 472.27/x
  3. Step 3: Cross multiply
    645.15x = 968.22 × 472.27
  4. Step 4: Simplify right side
    645.15x = 457,260.29
  5. Step 5: Solve for x
    x = 457,260.29/645.15
  6. Step 6: Final answer
    x = 708.76

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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.