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Finding the Fourth Proportional to 351.40, 527.05 and 107.95

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Solution

The fourth proportional to 351.40, 527.05 and 107.95 is: 161.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.40 : 527.05 = 107.95 : x
  2. Step 2: Convert to fraction form
    351.40/527.05 = 107.95/x
  3. Step 3: Cross multiply
    351.40x = 527.05 × 107.95
  4. Step 4: Simplify right side
    351.40x = 56,895.05
  5. Step 5: Solve for x
    x = 56,895.05/351.40
  6. Step 6: Final answer
    x = 161.91

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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.