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Finding the Fourth Proportional to 1,090.37, 1,635.71 and 628.07

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Solution

The fourth proportional to 1,090.37, 1,635.71 and 628.07 is: 942.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.37 : 1,635.71 = 628.07 : x
  2. Step 2: Convert to fraction form
    1,090.37/1,635.71 = 628.07/x
  3. Step 3: Cross multiply
    1,090.37x = 1,635.71 × 628.07
  4. Step 4: Simplify right side
    1,090.37x = 1,027,329.06
  5. Step 5: Solve for x
    x = 1,027,329.06/1,090.37
  6. Step 6: Final answer
    x = 942.19

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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.