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Finding the Fourth Proportional to 471.37, 706.66 and 420.12

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Solution

The fourth proportional to 471.37, 706.66 and 420.12 is: 629.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.37 : 706.66 = 420.12 : x
  2. Step 2: Convert to fraction form
    471.37/706.66 = 420.12/x
  3. Step 3: Cross multiply
    471.37x = 706.66 × 420.12
  4. Step 4: Simplify right side
    471.37x = 296,882.00
  5. Step 5: Solve for x
    x = 296,882.00/471.37
  6. Step 6: Final answer
    x = 629.83

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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.