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Finding the Fourth Proportional to 660.02, 989.42 and 351.41

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Solution

The fourth proportional to 660.02, 989.42 and 351.41 is: 526.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.02 : 989.42 = 351.41 : x
  2. Step 2: Convert to fraction form
    660.02/989.42 = 351.41/x
  3. Step 3: Cross multiply
    660.02x = 989.42 × 351.41
  4. Step 4: Simplify right side
    660.02x = 347,685.38
  5. Step 5: Solve for x
    x = 347,685.38/660.02
  6. Step 6: Final answer
    x = 526.78

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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.