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Finding the Fourth Proportional to 660.60, 910.44 and 629.88

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Solution

The fourth proportional to 660.60, 910.44 and 629.88 is: 868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.60 : 910.44 = 629.88 : x
  2. Step 2: Convert to fraction form
    660.60/910.44 = 629.88/x
  3. Step 3: Cross multiply
    660.60x = 910.44 × 629.88
  4. Step 4: Simplify right side
    660.60x = 573,467.95
  5. Step 5: Solve for x
    x = 573,467.95/660.60
  6. Step 6: Final answer
    x = 868.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.