Home / 2,686.23-3,706.83-1,890.68

Finding the Fourth Proportional to 2,686.23, 3,706.83 and 1,890.68

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Solution

The fourth proportional to 2,686.23, 3,706.83 and 1,890.68 is: 2,609.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.23 : 3,706.83 = 1,890.68 : x
  2. Step 2: Convert to fraction form
    2,686.23/3,706.83 = 1,890.68/x
  3. Step 3: Cross multiply
    2,686.23x = 3,706.83 × 1,890.68
  4. Step 4: Simplify right side
    2,686.23x = 7,008,410.81
  5. Step 5: Solve for x
    x = 7,008,410.81/2,686.23
  6. Step 6: Final answer
    x = 2,609.01

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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.