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Finding the Fourth Proportional to 211.13, 291.22 and 161.93

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Solution

The fourth proportional to 211.13, 291.22 and 161.93 is: 223.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.13 : 291.22 = 161.93 : x
  2. Step 2: Convert to fraction form
    211.13/291.22 = 161.93/x
  3. Step 3: Cross multiply
    211.13x = 291.22 × 161.93
  4. Step 4: Simplify right side
    211.13x = 47,154.99
  5. Step 5: Solve for x
    x = 47,154.99/211.13
  6. Step 6: Final answer
    x = 223.35

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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.