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Finding the Fourth Proportional to 354.26, 531.40 and 97.76

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Solution

The fourth proportional to 354.26, 531.40 and 97.76 is: 146.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.26 : 531.40 = 97.76 : x
  2. Step 2: Convert to fraction form
    354.26/531.40 = 97.76/x
  3. Step 3: Cross multiply
    354.26x = 531.40 × 97.76
  4. Step 4: Simplify right side
    354.26x = 51,949.66
  5. Step 5: Solve for x
    x = 51,949.66/354.26
  6. Step 6: Final answer
    x = 146.64

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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.