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Finding the Fourth Proportional to 660.51, 990.75 and 173.58

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Solution

The fourth proportional to 660.51, 990.75 and 173.58 is: 260.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.51 : 990.75 = 173.58 : x
  2. Step 2: Convert to fraction form
    660.51/990.75 = 173.58/x
  3. Step 3: Cross multiply
    660.51x = 990.75 × 173.58
  4. Step 4: Simplify right side
    660.51x = 171,974.39
  5. Step 5: Solve for x
    x = 171,974.39/660.51
  6. Step 6: Final answer
    x = 260.37

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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.