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Finding the Fourth Proportional to 573.38, 857.44 and 427.23

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Solution

The fourth proportional to 573.38, 857.44 and 427.23 is: 638.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.38 : 857.44 = 427.23 : x
  2. Step 2: Convert to fraction form
    573.38/857.44 = 427.23/x
  3. Step 3: Cross multiply
    573.38x = 857.44 × 427.23
  4. Step 4: Simplify right side
    573.38x = 366,327.56
  5. Step 5: Solve for x
    x = 366,327.56/573.38
  6. Step 6: Final answer
    x = 638.89

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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.