Home / 2,039.69-2,813.77-1,331.20

Finding the Fourth Proportional to 2,039.69, 2,813.77 and 1,331.20

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Solution

The fourth proportional to 2,039.69, 2,813.77 and 1,331.20 is: 1,836.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.69 : 2,813.77 = 1,331.20 : x
  2. Step 2: Convert to fraction form
    2,039.69/2,813.77 = 1,331.20/x
  3. Step 3: Cross multiply
    2,039.69x = 2,813.77 × 1,331.20
  4. Step 4: Simplify right side
    2,039.69x = 3,745,688.32
  5. Step 5: Solve for x
    x = 3,745,688.32/2,039.69
  6. Step 6: Final answer
    x = 1,836.40

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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.