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Finding the Fourth Proportional to 949.87, 1,425.01 and 539.20

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Solution

The fourth proportional to 949.87, 1,425.01 and 539.20 is: 808.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.87 : 1,425.01 = 539.20 : x
  2. Step 2: Convert to fraction form
    949.87/1,425.01 = 539.20/x
  3. Step 3: Cross multiply
    949.87x = 1,425.01 × 539.20
  4. Step 4: Simplify right side
    949.87x = 768,365.39
  5. Step 5: Solve for x
    x = 768,365.39/949.87
  6. Step 6: Final answer
    x = 808.92

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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.