Home / 1,790.30-2,686.67-817.09

Finding the Fourth Proportional to 1,790.30, 2,686.67 and 817.09

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Solution

The fourth proportional to 1,790.30, 2,686.67 and 817.09 is: 1,226.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.30 : 2,686.67 = 817.09 : x
  2. Step 2: Convert to fraction form
    1,790.30/2,686.67 = 817.09/x
  3. Step 3: Cross multiply
    1,790.30x = 2,686.67 × 817.09
  4. Step 4: Simplify right side
    1,790.30x = 2,195,243.45
  5. Step 5: Solve for x
    x = 2,195,243.45/1,790.30
  6. Step 6: Final answer
    x = 1,226.19

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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.