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Finding the Fourth Proportional to 959.34, 1,438.58 and 548.66

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Solution

The fourth proportional to 959.34, 1,438.58 and 548.66 is: 822.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.34 : 1,438.58 = 548.66 : x
  2. Step 2: Convert to fraction form
    959.34/1,438.58 = 548.66/x
  3. Step 3: Cross multiply
    959.34x = 1,438.58 × 548.66
  4. Step 4: Simplify right side
    959.34x = 789,291.30
  5. Step 5: Solve for x
    x = 789,291.30/959.34
  6. Step 6: Final answer
    x = 822.74

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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.