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Finding the Fourth Proportional to 1,262.12, 1,900.19 and 1,109.03

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Solution

The fourth proportional to 1,262.12, 1,900.19 and 1,109.03 is: 1,669.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.12 : 1,900.19 = 1,109.03 : x
  2. Step 2: Convert to fraction form
    1,262.12/1,900.19 = 1,109.03/x
  3. Step 3: Cross multiply
    1,262.12x = 1,900.19 × 1,109.03
  4. Step 4: Simplify right side
    1,262.12x = 2,107,360.99
  5. Step 5: Solve for x
    x = 2,107,360.99/1,262.12
  6. Step 6: Final answer
    x = 1,669.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.