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Finding the Fourth Proportional to 222.76, 307.40 and 124.50

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Solution

The fourth proportional to 222.76, 307.40 and 124.50 is: 171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.76 : 307.40 = 124.50 : x
  2. Step 2: Convert to fraction form
    222.76/307.40 = 124.50/x
  3. Step 3: Cross multiply
    222.76x = 307.40 × 124.50
  4. Step 4: Simplify right side
    222.76x = 38,270.68
  5. Step 5: Solve for x
    x = 38,270.68/222.76
  6. Step 6: Final answer
    x = 171.80

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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.