Home / 2,199.12-3,298.68-639.17

Finding the Fourth Proportional to 2,199.12, 3,298.68 and 639.17

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Solution

The fourth proportional to 2,199.12, 3,298.68 and 639.17 is: 958.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,199.12 : 3,298.68 = 639.17 : x
  2. Step 2: Convert to fraction form
    2,199.12/3,298.68 = 639.17/x
  3. Step 3: Cross multiply
    2,199.12x = 3,298.68 × 639.17
  4. Step 4: Simplify right side
    2,199.12x = 2,108,433.53
  5. Step 5: Solve for x
    x = 2,108,433.53/2,199.12
  6. Step 6: Final answer
    x = 958.76

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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.