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Finding the Fourth Proportional to 2,145.41, 3,216.07 and 683.62

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Solution

The fourth proportional to 2,145.41, 3,216.07 and 683.62 is: 1,024.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.41 : 3,216.07 = 683.62 : x
  2. Step 2: Convert to fraction form
    2,145.41/3,216.07 = 683.62/x
  3. Step 3: Cross multiply
    2,145.41x = 3,216.07 × 683.62
  4. Step 4: Simplify right side
    2,145.41x = 2,198,569.77
  5. Step 5: Solve for x
    x = 2,198,569.77/2,145.41
  6. Step 6: Final answer
    x = 1,024.78

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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.