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Finding the Fourth Proportional to 442.96, 611.23 and 256.45

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Solution

The fourth proportional to 442.96, 611.23 and 256.45 is: 353.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.96 : 611.23 = 256.45 : x
  2. Step 2: Convert to fraction form
    442.96/611.23 = 256.45/x
  3. Step 3: Cross multiply
    442.96x = 611.23 × 256.45
  4. Step 4: Simplify right side
    442.96x = 156,749.93
  5. Step 5: Solve for x
    x = 156,749.93/442.96
  6. Step 6: Final answer
    x = 353.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.