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Finding the Fourth Proportional to 222.40, 307 and 156.94

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Solution

The fourth proportional to 222.40, 307 and 156.94 is: 216.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.40 : 307 = 156.94 : x
  2. Step 2: Convert to fraction form
    222.40/307 = 156.94/x
  3. Step 3: Cross multiply
    222.40x = 307 × 156.94
  4. Step 4: Simplify right side
    222.40x = 48,180.58
  5. Step 5: Solve for x
    x = 48,180.58/222.40
  6. Step 6: Final answer
    x = 216.64

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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.