Home / 1,856.79-2,782.44-1,720.11

Finding the Fourth Proportional to 1,856.79, 2,782.44 and 1,720.11

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Solution

The fourth proportional to 1,856.79, 2,782.44 and 1,720.11 is: 2,577.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.79 : 2,782.44 = 1,720.11 : x
  2. Step 2: Convert to fraction form
    1,856.79/2,782.44 = 1,720.11/x
  3. Step 3: Cross multiply
    1,856.79x = 2,782.44 × 1,720.11
  4. Step 4: Simplify right side
    1,856.79x = 4,786,102.87
  5. Step 5: Solve for x
    x = 4,786,102.87/1,856.79
  6. Step 6: Final answer
    x = 2,577.62

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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.