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Finding the Fourth Proportional to 471.20, 706.56 and 197.28

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Solution

The fourth proportional to 471.20, 706.56 and 197.28 is: 295.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.20 : 706.56 = 197.28 : x
  2. Step 2: Convert to fraction form
    471.20/706.56 = 197.28/x
  3. Step 3: Cross multiply
    471.20x = 706.56 × 197.28
  4. Step 4: Simplify right side
    471.20x = 139,390.16
  5. Step 5: Solve for x
    x = 139,390.16/471.20
  6. Step 6: Final answer
    x = 295.82

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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.