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Finding the Fourth Proportional to 257.00, 353.90 and 191.39

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Solution

The fourth proportional to 257.00, 353.90 and 191.39 is: 263.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.00 : 353.90 = 191.39 : x
  2. Step 2: Convert to fraction form
    257.00/353.90 = 191.39/x
  3. Step 3: Cross multiply
    257.00x = 353.90 × 191.39
  4. Step 4: Simplify right side
    257.00x = 67,731.63
  5. Step 5: Solve for x
    x = 67,731.63/257.00
  6. Step 6: Final answer
    x = 263.55

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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.