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Finding the Fourth Proportional to 949.92, 1,421.22 and 539.25

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Solution

The fourth proportional to 949.92, 1,421.22 and 539.25 is: 806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.92 : 1,421.22 = 539.25 : x
  2. Step 2: Convert to fraction form
    949.92/1,421.22 = 539.25/x
  3. Step 3: Cross multiply
    949.92x = 1,421.22 × 539.25
  4. Step 4: Simplify right side
    949.92x = 766,392.89
  5. Step 5: Solve for x
    x = 766,392.89/949.92
  6. Step 6: Final answer
    x = 806.80

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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.