Home / 2,100.13-3,149.82-638.96

Finding the Fourth Proportional to 2,100.13, 3,149.82 and 638.96

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Solution

The fourth proportional to 2,100.13, 3,149.82 and 638.96 is: 958.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.13 : 3,149.82 = 638.96 : x
  2. Step 2: Convert to fraction form
    2,100.13/3,149.82 = 638.96/x
  3. Step 3: Cross multiply
    2,100.13x = 3,149.82 × 638.96
  4. Step 4: Simplify right side
    2,100.13x = 2,012,593.24
  5. Step 5: Solve for x
    x = 2,012,593.24/2,100.13
  6. Step 6: Final answer
    x = 958.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.