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Finding the Fourth Proportional to 470.49, 704.31 and 427.15

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Solution

The fourth proportional to 470.49, 704.31 and 427.15 is: 639.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.49 : 704.31 = 427.15 : x
  2. Step 2: Convert to fraction form
    470.49/704.31 = 427.15/x
  3. Step 3: Cross multiply
    470.49x = 704.31 × 427.15
  4. Step 4: Simplify right side
    470.49x = 300,846.02
  5. Step 5: Solve for x
    x = 300,846.02/470.49
  6. Step 6: Final answer
    x = 639.43

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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.