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Finding the Fourth Proportional to 188.28, 259.59 and 156.66

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Solution

The fourth proportional to 188.28, 259.59 and 156.66 is: 215.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.28 : 259.59 = 156.66 : x
  2. Step 2: Convert to fraction form
    188.28/259.59 = 156.66/x
  3. Step 3: Cross multiply
    188.28x = 259.59 × 156.66
  4. Step 4: Simplify right side
    188.28x = 40,667.37
  5. Step 5: Solve for x
    x = 40,667.37/188.28
  6. Step 6: Final answer
    x = 215.99

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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.