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Finding the Fourth Proportional to 660.26, 989.60 and 243.46

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Solution

The fourth proportional to 660.26, 989.60 and 243.46 is: 364.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.26 : 989.60 = 243.46 : x
  2. Step 2: Convert to fraction form
    660.26/989.60 = 243.46/x
  3. Step 3: Cross multiply
    660.26x = 989.60 × 243.46
  4. Step 4: Simplify right side
    660.26x = 240,924.32
  5. Step 5: Solve for x
    x = 240,924.32/660.26
  6. Step 6: Final answer
    x = 364.89

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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.