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Finding the Fourth Proportional to 471.82, 706.28 and 425.34

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Solution

The fourth proportional to 471.82, 706.28 and 425.34 is: 636.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.82 : 706.28 = 425.34 : x
  2. Step 2: Convert to fraction form
    471.82/706.28 = 425.34/x
  3. Step 3: Cross multiply
    471.82x = 706.28 × 425.34
  4. Step 4: Simplify right side
    471.82x = 300,407.01
  5. Step 5: Solve for x
    x = 300,407.01/471.82
  6. Step 6: Final answer
    x = 636.70

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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.