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Finding the Fourth Proportional to 1,449.69, 2,174.87 and 628.10

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Solution

The fourth proportional to 1,449.69, 2,174.87 and 628.10 is: 942.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.69 : 2,174.87 = 628.10 : x
  2. Step 2: Convert to fraction form
    1,449.69/2,174.87 = 628.10/x
  3. Step 3: Cross multiply
    1,449.69x = 2,174.87 × 628.10
  4. Step 4: Simplify right side
    1,449.69x = 1,366,021.83
  5. Step 5: Solve for x
    x = 1,366,021.83/1,449.69
  6. Step 6: Final answer
    x = 942.29

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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.