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Finding the Fourth Proportional to 660.76, 989.88 and 352.16

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Solution

The fourth proportional to 660.76, 989.88 and 352.16 is: 527.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.76 : 989.88 = 352.16 : x
  2. Step 2: Convert to fraction form
    660.76/989.88 = 352.16/x
  3. Step 3: Cross multiply
    660.76x = 989.88 × 352.16
  4. Step 4: Simplify right side
    660.76x = 348,596.14
  5. Step 5: Solve for x
    x = 348,596.14/660.76
  6. Step 6: Final answer
    x = 527.57

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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.