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Finding the Fourth Proportional to 307.38, 461.52 and 145.38

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Solution

The fourth proportional to 307.38, 461.52 and 145.38 is: 218.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.38 : 461.52 = 145.38 : x
  2. Step 2: Convert to fraction form
    307.38/461.52 = 145.38/x
  3. Step 3: Cross multiply
    307.38x = 461.52 × 145.38
  4. Step 4: Simplify right side
    307.38x = 67,095.78
  5. Step 5: Solve for x
    x = 67,095.78/307.38
  6. Step 6: Final answer
    x = 218.28

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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.