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Finding the Fourth Proportional to 1,090.37, 1,635.89 and 628.49

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Solution

The fourth proportional to 1,090.37, 1,635.89 and 628.49 is: 942.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.37 : 1,635.89 = 628.49 : x
  2. Step 2: Convert to fraction form
    1,090.37/1,635.89 = 628.49/x
  3. Step 3: Cross multiply
    1,090.37x = 1,635.89 × 628.49
  4. Step 4: Simplify right side
    1,090.37x = 1,028,141.45
  5. Step 5: Solve for x
    x = 1,028,141.45/1,090.37
  6. Step 6: Final answer
    x = 942.93

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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.