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Finding the Fourth Proportional to 2,144.55, 3,216.93 and 683.81

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Solution

The fourth proportional to 2,144.55, 3,216.93 and 683.81 is: 1,025.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,144.55 : 3,216.93 = 683.81 : x
  2. Step 2: Convert to fraction form
    2,144.55/3,216.93 = 683.81/x
  3. Step 3: Cross multiply
    2,144.55x = 3,216.93 × 683.81
  4. Step 4: Simplify right side
    2,144.55x = 2,199,752.82
  5. Step 5: Solve for x
    x = 2,199,752.82/2,144.55
  6. Step 6: Final answer
    x = 1,025.74

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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.