Home / 1,873.98-2,811.51-720.54

Finding the Fourth Proportional to 1,873.98, 2,811.51 and 720.54

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Solution

The fourth proportional to 1,873.98, 2,811.51 and 720.54 is: 1,081.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873.98 : 2,811.51 = 720.54 : x
  2. Step 2: Convert to fraction form
    1,873.98/2,811.51 = 720.54/x
  3. Step 3: Cross multiply
    1,873.98x = 2,811.51 × 720.54
  4. Step 4: Simplify right side
    1,873.98x = 2,025,805.42
  5. Step 5: Solve for x
    x = 2,025,805.42/1,873.98
  6. Step 6: Final answer
    x = 1,081.02

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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.