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Finding the Fourth Proportional to 222.71, 307.38 and 153.11

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Solution

The fourth proportional to 222.71, 307.38 and 153.11 is: 211.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.71 : 307.38 = 153.11 : x
  2. Step 2: Convert to fraction form
    222.71/307.38 = 153.11/x
  3. Step 3: Cross multiply
    222.71x = 307.38 × 153.11
  4. Step 4: Simplify right side
    222.71x = 47,061.41
  5. Step 5: Solve for x
    x = 47,061.41/222.71
  6. Step 6: Final answer
    x = 211.32

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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.