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Finding the Fourth Proportional to 1,090.80, 1,629.36 and 926.73

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Solution

The fourth proportional to 1,090.80, 1,629.36 and 926.73 is: 1,384.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.80 : 1,629.36 = 926.73 : x
  2. Step 2: Convert to fraction form
    1,090.80/1,629.36 = 926.73/x
  3. Step 3: Cross multiply
    1,090.80x = 1,629.36 × 926.73
  4. Step 4: Simplify right side
    1,090.80x = 1,509,976.79
  5. Step 5: Solve for x
    x = 1,509,976.79/1,090.80
  6. Step 6: Final answer
    x = 1,384.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.