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Finding the Fourth Proportional to 660.73, 991.53 and 352.81

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Solution

The fourth proportional to 660.73, 991.53 and 352.81 is: 529.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.73 : 991.53 = 352.81 : x
  2. Step 2: Convert to fraction form
    660.73/991.53 = 352.81/x
  3. Step 3: Cross multiply
    660.73x = 991.53 × 352.81
  4. Step 4: Simplify right side
    660.73x = 349,821.70
  5. Step 5: Solve for x
    x = 349,821.70/660.73
  6. Step 6: Final answer
    x = 529.45

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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.