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Finding the Fourth Proportional to 660.36, 992.52 and 445.32

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Solution

The fourth proportional to 660.36, 992.52 and 445.32 is: 669.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.36 : 992.52 = 445.32 : x
  2. Step 2: Convert to fraction form
    660.36/992.52 = 445.32/x
  3. Step 3: Cross multiply
    660.36x = 992.52 × 445.32
  4. Step 4: Simplify right side
    660.36x = 441,989.01
  5. Step 5: Solve for x
    x = 441,989.01/660.36
  6. Step 6: Final answer
    x = 669.32

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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.