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Finding the Fourth Proportional to 1,180.22, 1,628.60 and 656.28

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Solution

The fourth proportional to 1,180.22, 1,628.60 and 656.28 is: 905.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.22 : 1,628.60 = 656.28 : x
  2. Step 2: Convert to fraction form
    1,180.22/1,628.60 = 656.28/x
  3. Step 3: Cross multiply
    1,180.22x = 1,628.60 × 656.28
  4. Step 4: Simplify right side
    1,180.22x = 1,068,817.61
  5. Step 5: Solve for x
    x = 1,068,817.61/1,180.22
  6. Step 6: Final answer
    x = 905.61

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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.