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Finding the Fourth Proportional to 442.71, 611.03 and 256.23

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Solution

The fourth proportional to 442.71, 611.03 and 256.23 is: 353.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.71 : 611.03 = 256.23 : x
  2. Step 2: Convert to fraction form
    442.71/611.03 = 256.23/x
  3. Step 3: Cross multiply
    442.71x = 611.03 × 256.23
  4. Step 4: Simplify right side
    442.71x = 156,564.22
  5. Step 5: Solve for x
    x = 156,564.22/442.71
  6. Step 6: Final answer
    x = 353.65

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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.