Home / 1,620.81-2,431.62-1,372.95

Finding the Fourth Proportional to 1,620.81, 2,431.62 and 1,372.95

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Solution

The fourth proportional to 1,620.81, 2,431.62 and 1,372.95 is: 2,059.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.81 : 2,431.62 = 1,372.95 : x
  2. Step 2: Convert to fraction form
    1,620.81/2,431.62 = 1,372.95/x
  3. Step 3: Cross multiply
    1,620.81x = 2,431.62 × 1,372.95
  4. Step 4: Simplify right side
    1,620.81x = 3,338,492.68
  5. Step 5: Solve for x
    x = 3,338,492.68/1,620.81
  6. Step 6: Final answer
    x = 2,059.77

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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.