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Finding the Fourth Proportional to 660.49, 990.79 and 173.54

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Solution

The fourth proportional to 660.49, 990.79 and 173.54 is: 260.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.49 : 990.79 = 173.54 : x
  2. Step 2: Convert to fraction form
    660.49/990.79 = 173.54/x
  3. Step 3: Cross multiply
    660.49x = 990.79 × 173.54
  4. Step 4: Simplify right side
    660.49x = 171,943.74
  5. Step 5: Solve for x
    x = 171,943.74/660.49
  6. Step 6: Final answer
    x = 260.33

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1.5x scale

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.