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Finding the Fourth Proportional to 187.65, 259.10 and 171.05

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Solution

The fourth proportional to 187.65, 259.10 and 171.05 is: 236.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.65 : 259.10 = 171.05 : x
  2. Step 2: Convert to fraction form
    187.65/259.10 = 171.05/x
  3. Step 3: Cross multiply
    187.65x = 259.10 × 171.05
  4. Step 4: Simplify right side
    187.65x = 44,317.55
  5. Step 5: Solve for x
    x = 44,317.55/187.65
  6. Step 6: Final answer
    x = 236.17

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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.