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Finding the Fourth Proportional to 660.46, 989.80 and 367.96

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Solution

The fourth proportional to 660.46, 989.80 and 367.96 is: 551.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.46 : 989.80 = 367.96 : x
  2. Step 2: Convert to fraction form
    660.46/989.80 = 367.96/x
  3. Step 3: Cross multiply
    660.46x = 989.80 × 367.96
  4. Step 4: Simplify right side
    660.46x = 364,206.81
  5. Step 5: Solve for x
    x = 364,206.81/660.46
  6. Step 6: Final answer
    x = 551.44

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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.