Home / 2,988.90-4,121.69-2,540.25

Finding the Fourth Proportional to 2,988.90, 4,121.69 and 2,540.25

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Solution

The fourth proportional to 2,988.90, 4,121.69 and 2,540.25 is: 3,503.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.90 : 4,121.69 = 2,540.25 : x
  2. Step 2: Convert to fraction form
    2,988.90/4,121.69 = 2,540.25/x
  3. Step 3: Cross multiply
    2,988.90x = 4,121.69 × 2,540.25
  4. Step 4: Simplify right side
    2,988.90x = 10,470,110.32
  5. Step 5: Solve for x
    x = 10,470,110.32/2,988.90
  6. Step 6: Final answer
    x = 3,503.00

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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.