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Finding the Fourth Proportional to 2,499.19, 3,748.80 and 855.75

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Solution

The fourth proportional to 2,499.19, 3,748.80 and 855.75 is: 1,283.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,499.19 : 3,748.80 = 855.75 : x
  2. Step 2: Convert to fraction form
    2,499.19/3,748.80 = 855.75/x
  3. Step 3: Cross multiply
    2,499.19x = 3,748.80 × 855.75
  4. Step 4: Simplify right side
    2,499.19x = 3,208,026.97
  5. Step 5: Solve for x
    x = 3,208,026.97/2,499.19
  6. Step 6: Final answer
    x = 1,283.63

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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.