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Finding the Fourth Proportional to 1,815.12, 2,720.88 and 876.33

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Solution

The fourth proportional to 1,815.12, 2,720.88 and 876.33 is: 1,313.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.12 : 2,720.88 = 876.33 : x
  2. Step 2: Convert to fraction form
    1,815.12/2,720.88 = 876.33/x
  3. Step 3: Cross multiply
    1,815.12x = 2,720.88 × 876.33
  4. Step 4: Simplify right side
    1,815.12x = 2,384,388.77
  5. Step 5: Solve for x
    x = 2,384,388.77/1,815.12
  6. Step 6: Final answer
    x = 1,313.63

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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.