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Finding the Fourth Proportional to 539.50, 809.25 and 197.50

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Solution

The fourth proportional to 539.50, 809.25 and 197.50 is: 296.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.50 : 809.25 = 197.50 : x
  2. Step 2: Convert to fraction form
    539.50/809.25 = 197.50/x
  3. Step 3: Cross multiply
    539.50x = 809.25 × 197.50
  4. Step 4: Simplify right side
    539.50x = 159,826.88
  5. Step 5: Solve for x
    x = 159,826.88/539.50
  6. Step 6: Final answer
    x = 296.25

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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.