Home / 2,990.35-4,480.54-2,111.40

Finding the Fourth Proportional to 2,990.35, 4,480.54 and 2,111.40

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Solution

The fourth proportional to 2,990.35, 4,480.54 and 2,111.40 is: 3,163.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.35 : 4,480.54 = 2,111.40 : x
  2. Step 2: Convert to fraction form
    2,990.35/4,480.54 = 2,111.40/x
  3. Step 3: Cross multiply
    2,990.35x = 4,480.54 × 2,111.40
  4. Step 4: Simplify right side
    2,990.35x = 9,460,212.16
  5. Step 5: Solve for x
    x = 9,460,212.16/2,990.35
  6. Step 6: Final answer
    x = 3,163.58

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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.