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Finding the Fourth Proportional to 307.46, 461.21 and 124.85

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Solution

The fourth proportional to 307.46, 461.21 and 124.85 is: 187.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.46 : 461.21 = 124.85 : x
  2. Step 2: Convert to fraction form
    307.46/461.21 = 124.85/x
  3. Step 3: Cross multiply
    307.46x = 461.21 × 124.85
  4. Step 4: Simplify right side
    307.46x = 57,582.60
  5. Step 5: Solve for x
    x = 57,582.60/307.46
  6. Step 6: Final answer
    x = 187.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.