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Finding the Fourth Proportional to 211.58, 291.83 and 124.27

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Solution

The fourth proportional to 211.58, 291.83 and 124.27 is: 171.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.58 : 291.83 = 124.27 : x
  2. Step 2: Convert to fraction form
    211.58/291.83 = 124.27/x
  3. Step 3: Cross multiply
    211.58x = 291.83 × 124.27
  4. Step 4: Simplify right side
    211.58x = 36,264.36
  5. Step 5: Solve for x
    x = 36,264.36/211.58
  6. Step 6: Final answer
    x = 171.40

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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.