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Finding the Fourth Proportional to 256.58, 353.86 and 191.24

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Solution

The fourth proportional to 256.58, 353.86 and 191.24 is: 263.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.58 : 353.86 = 191.24 : x
  2. Step 2: Convert to fraction form
    256.58/353.86 = 191.24/x
  3. Step 3: Cross multiply
    256.58x = 353.86 × 191.24
  4. Step 4: Simplify right side
    256.58x = 67,669.94
  5. Step 5: Solve for x
    x = 67,669.94/256.58
  6. Step 6: Final answer
    x = 263.74

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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.