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Finding the Fourth Proportional to 1,872.74, 2,809.12 and 899.12

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Solution

The fourth proportional to 1,872.74, 2,809.12 and 899.12 is: 1,348.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.74 : 2,809.12 = 899.12 : x
  2. Step 2: Convert to fraction form
    1,872.74/2,809.12 = 899.12/x
  3. Step 3: Cross multiply
    1,872.74x = 2,809.12 × 899.12
  4. Step 4: Simplify right side
    1,872.74x = 2,525,735.97
  5. Step 5: Solve for x
    x = 2,525,735.97/1,872.74
  6. Step 6: Final answer
    x = 1,348.68

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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.