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Finding the Fourth Proportional to 223.27, 307.81 and 156.79

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Solution

The fourth proportional to 223.27, 307.81 and 156.79 is: 216.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.27 : 307.81 = 156.79 : x
  2. Step 2: Convert to fraction form
    223.27/307.81 = 156.79/x
  3. Step 3: Cross multiply
    223.27x = 307.81 × 156.79
  4. Step 4: Simplify right side
    223.27x = 48,261.53
  5. Step 5: Solve for x
    x = 48,261.53/223.27
  6. Step 6: Final answer
    x = 216.16

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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.