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Finding the Fourth Proportional to 211.48, 316.62 and 124.64

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Solution

The fourth proportional to 211.48, 316.62 and 124.64 is: 186.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.48 : 316.62 = 124.64 : x
  2. Step 2: Convert to fraction form
    211.48/316.62 = 124.64/x
  3. Step 3: Cross multiply
    211.48x = 316.62 × 124.64
  4. Step 4: Simplify right side
    211.48x = 39,463.52
  5. Step 5: Solve for x
    x = 39,463.52/211.48
  6. Step 6: Final answer
    x = 186.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.