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Finding the Fourth Proportional to 471.35, 706.18 and 420.44

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Solution

The fourth proportional to 471.35, 706.18 and 420.44 is: 629.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.35 : 706.18 = 420.44 : x
  2. Step 2: Convert to fraction form
    471.35/706.18 = 420.44/x
  3. Step 3: Cross multiply
    471.35x = 706.18 × 420.44
  4. Step 4: Simplify right side
    471.35x = 296,904.22
  5. Step 5: Solve for x
    x = 296,904.22/471.35
  6. Step 6: Final answer
    x = 629.91

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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.