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Finding the Fourth Proportional to 222.53, 307.08 and 129.29

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Solution

The fourth proportional to 222.53, 307.08 and 129.29 is: 178.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.53 : 307.08 = 129.29 : x
  2. Step 2: Convert to fraction form
    222.53/307.08 = 129.29/x
  3. Step 3: Cross multiply
    222.53x = 307.08 × 129.29
  4. Step 4: Simplify right side
    222.53x = 39,700.84
  5. Step 5: Solve for x
    x = 39,700.84/222.53
  6. Step 6: Final answer
    x = 178.41

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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.