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Finding the Fourth Proportional to 307.80, 462.15 and 186.57

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Solution

The fourth proportional to 307.80, 462.15 and 186.57 is: 280.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.80 : 462.15 = 186.57 : x
  2. Step 2: Convert to fraction form
    307.80/462.15 = 186.57/x
  3. Step 3: Cross multiply
    307.80x = 462.15 × 186.57
  4. Step 4: Simplify right side
    307.80x = 86,223.33
  5. Step 5: Solve for x
    x = 86,223.33/307.80
  6. Step 6: Final answer
    x = 280.13

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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.