Home / 1,900.68-2,621.58-1,238.10

Finding the Fourth Proportional to 1,900.68, 2,621.58 and 1,238.10

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Solution

The fourth proportional to 1,900.68, 2,621.58 and 1,238.10 is: 1,707.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900.68 : 2,621.58 = 1,238.10 : x
  2. Step 2: Convert to fraction form
    1,900.68/2,621.58 = 1,238.10/x
  3. Step 3: Cross multiply
    1,900.68x = 2,621.58 × 1,238.10
  4. Step 4: Simplify right side
    1,900.68x = 3,245,778.20
  5. Step 5: Solve for x
    x = 3,245,778.20/1,900.68
  6. Step 6: Final answer
    x = 1,707.69

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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.