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Finding the Fourth Proportional to 427.41, 640.37 and 293.58

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Solution

The fourth proportional to 427.41, 640.37 and 293.58 is: 439.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.41 : 640.37 = 293.58 : x
  2. Step 2: Convert to fraction form
    427.41/640.37 = 293.58/x
  3. Step 3: Cross multiply
    427.41x = 640.37 × 293.58
  4. Step 4: Simplify right side
    427.41x = 187,999.82
  5. Step 5: Solve for x
    x = 187,999.82/427.41
  6. Step 6: Final answer
    x = 439.86

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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.