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Finding the Fourth Proportional to 187.69, 279.79 and 177.43

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Solution

The fourth proportional to 187.69, 279.79 and 177.43 is: 264.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.69 : 279.79 = 177.43 : x
  2. Step 2: Convert to fraction form
    187.69/279.79 = 177.43/x
  3. Step 3: Cross multiply
    187.69x = 279.79 × 177.43
  4. Step 4: Simplify right side
    187.69x = 49,643.14
  5. Step 5: Solve for x
    x = 49,643.14/187.69
  6. Step 6: Final answer
    x = 264.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.