Home / 2,071.91-2,859.36-1,187.81

Finding the Fourth Proportional to 2,071.91, 2,859.36 and 1,187.81

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Solution

The fourth proportional to 2,071.91, 2,859.36 and 1,187.81 is: 1,639.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.91 : 2,859.36 = 1,187.81 : x
  2. Step 2: Convert to fraction form
    2,071.91/2,859.36 = 1,187.81/x
  3. Step 3: Cross multiply
    2,071.91x = 2,859.36 × 1,187.81
  4. Step 4: Simplify right side
    2,071.91x = 3,396,376.40
  5. Step 5: Solve for x
    x = 3,396,376.40/2,071.91
  6. Step 6: Final answer
    x = 1,639.25

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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.