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Finding the Fourth Proportional to 1,873, 2,809.49 and 486.33

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Solution

The fourth proportional to 1,873, 2,809.49 and 486.33 is: 729.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873 : 2,809.49 = 486.33 : x
  2. Step 2: Convert to fraction form
    1,873/2,809.49 = 486.33/x
  3. Step 3: Cross multiply
    1,873x = 2,809.49 × 486.33
  4. Step 4: Simplify right side
    1,873x = 1,366,339.27
  5. Step 5: Solve for x
    x = 1,366,339.27/1,873
  6. Step 6: Final answer
    x = 729.49

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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.