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Finding the Fourth Proportional to 880.88, 1,321.62 and 636.96

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Solution

The fourth proportional to 880.88, 1,321.62 and 636.96 is: 955.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.88 : 1,321.62 = 636.96 : x
  2. Step 2: Convert to fraction form
    880.88/1,321.62 = 636.96/x
  3. Step 3: Cross multiply
    880.88x = 1,321.62 × 636.96
  4. Step 4: Simplify right side
    880.88x = 841,821.64
  5. Step 5: Solve for x
    x = 841,821.64/880.88
  6. Step 6: Final answer
    x = 955.67

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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.