Home / 3,979.40-5,491.73-2,210.90

Finding the Fourth Proportional to 3,979.40, 5,491.73 and 2,210.90

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Solution

The fourth proportional to 3,979.40, 5,491.73 and 2,210.90 is: 3,051.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.40 : 5,491.73 = 2,210.90 : x
  2. Step 2: Convert to fraction form
    3,979.40/5,491.73 = 2,210.90/x
  3. Step 3: Cross multiply
    3,979.40x = 5,491.73 × 2,210.90
  4. Step 4: Simplify right side
    3,979.40x = 12,141,643.93
  5. Step 5: Solve for x
    x = 12,141,643.93/3,979.40
  6. Step 6: Final answer
    x = 3,051.13

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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.