Home / 3,980.10-5,488.87-2,705.90

Finding the Fourth Proportional to 3,980.10, 5,488.87 and 2,705.90

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Solution

The fourth proportional to 3,980.10, 5,488.87 and 2,705.90 is: 3,731.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.10 : 5,488.87 = 2,705.90 : x
  2. Step 2: Convert to fraction form
    3,980.10/5,488.87 = 2,705.90/x
  3. Step 3: Cross multiply
    3,980.10x = 5,488.87 × 2,705.90
  4. Step 4: Simplify right side
    3,980.10x = 14,852,299.12
  5. Step 5: Solve for x
    x = 14,852,299.12/3,980.10
  6. Step 6: Final answer
    x = 3,731.64

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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.