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Finding the Fourth Proportional to 660.14, 990.74 and 352.27

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Solution

The fourth proportional to 660.14, 990.74 and 352.27 is: 528.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.14 : 990.74 = 352.27 : x
  2. Step 2: Convert to fraction form
    660.14/990.74 = 352.27/x
  3. Step 3: Cross multiply
    660.14x = 990.74 × 352.27
  4. Step 4: Simplify right side
    660.14x = 349,007.98
  5. Step 5: Solve for x
    x = 349,007.98/660.14
  6. Step 6: Final answer
    x = 528.69

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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.