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Finding the Fourth Proportional to 959.50, 1,438.62 and 548.86

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Solution

The fourth proportional to 959.50, 1,438.62 and 548.86 is: 822.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.50 : 1,438.62 = 548.86 : x
  2. Step 2: Convert to fraction form
    959.50/1,438.62 = 548.86/x
  3. Step 3: Cross multiply
    959.50x = 1,438.62 × 548.86
  4. Step 4: Simplify right side
    959.50x = 789,600.97
  5. Step 5: Solve for x
    x = 789,600.97/959.50
  6. Step 6: Final answer
    x = 822.93

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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.