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Finding the Fourth Proportional to 257.06, 354.75 and 140.63

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Solution

The fourth proportional to 257.06, 354.75 and 140.63 is: 194.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.06 : 354.75 = 140.63 : x
  2. Step 2: Convert to fraction form
    257.06/354.75 = 140.63/x
  3. Step 3: Cross multiply
    257.06x = 354.75 × 140.63
  4. Step 4: Simplify right side
    257.06x = 49,886.19
  5. Step 5: Solve for x
    x = 49,886.19/257.06
  6. Step 6: Final answer
    x = 194.06

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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.