Home / 2,899.19-3,976.29-2,780.12

Finding the Fourth Proportional to 2,899.19, 3,976.29 and 2,780.12

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Solution

The fourth proportional to 2,899.19, 3,976.29 and 2,780.12 is: 3,812.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,899.19 : 3,976.29 = 2,780.12 : x
  2. Step 2: Convert to fraction form
    2,899.19/3,976.29 = 2,780.12/x
  3. Step 3: Cross multiply
    2,899.19x = 3,976.29 × 2,780.12
  4. Step 4: Simplify right side
    2,899.19x = 11,054,549.45
  5. Step 5: Solve for x
    x = 11,054,549.45/2,899.19
  6. Step 6: Final answer
    x = 3,812.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.