Home / 2,539.86-3,504.81-1,420.80

Finding the Fourth Proportional to 2,539.86, 3,504.81 and 1,420.80

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Solution

The fourth proportional to 2,539.86, 3,504.81 and 1,420.80 is: 1,960.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,539.86 : 3,504.81 = 1,420.80 : x
  2. Step 2: Convert to fraction form
    2,539.86/3,504.81 = 1,420.80/x
  3. Step 3: Cross multiply
    2,539.86x = 3,504.81 × 1,420.80
  4. Step 4: Simplify right side
    2,539.86x = 4,979,634.05
  5. Step 5: Solve for x
    x = 4,979,634.05/2,539.86
  6. Step 6: Final answer
    x = 1,960.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.