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Finding the Fourth Proportional to 187.88, 257.45 and 185.31

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Solution

The fourth proportional to 187.88, 257.45 and 185.31 is: 253.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.88 : 257.45 = 185.31 : x
  2. Step 2: Convert to fraction form
    187.88/257.45 = 185.31/x
  3. Step 3: Cross multiply
    187.88x = 257.45 × 185.31
  4. Step 4: Simplify right side
    187.88x = 47,707.13
  5. Step 5: Solve for x
    x = 47,707.13/187.88
  6. Step 6: Final answer
    x = 253.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.