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Finding the Fourth Proportional to 301.90, 452.85 and 85.48

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Solution

The fourth proportional to 301.90, 452.85 and 85.48 is: 128.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.90 : 452.85 = 85.48 : x
  2. Step 2: Convert to fraction form
    301.90/452.85 = 85.48/x
  3. Step 3: Cross multiply
    301.90x = 452.85 × 85.48
  4. Step 4: Simplify right side
    301.90x = 38,709.62
  5. Step 5: Solve for x
    x = 38,709.62/301.90
  6. Step 6: Final answer
    x = 128.22

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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.