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Finding the Fourth Proportional to 660.37, 990.56 and 173.41

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Solution

The fourth proportional to 660.37, 990.56 and 173.41 is: 260.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.37 : 990.56 = 173.41 : x
  2. Step 2: Convert to fraction form
    660.37/990.56 = 173.41/x
  3. Step 3: Cross multiply
    660.37x = 990.56 × 173.41
  4. Step 4: Simplify right side
    660.37x = 171,773.01
  5. Step 5: Solve for x
    x = 171,773.01/660.37
  6. Step 6: Final answer
    x = 260.12

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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.