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Finding the Fourth Proportional to 966.62, 1,448.93 and 380.81

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Solution

The fourth proportional to 966.62, 1,448.93 and 380.81 is: 570.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.62 : 1,448.93 = 380.81 : x
  2. Step 2: Convert to fraction form
    966.62/1,448.93 = 380.81/x
  3. Step 3: Cross multiply
    966.62x = 1,448.93 × 380.81
  4. Step 4: Simplify right side
    966.62x = 551,757.88
  5. Step 5: Solve for x
    x = 551,757.88/966.62
  6. Step 6: Final answer
    x = 570.81

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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.