Home / 1,640.12-2,461.79-1,120.91

Finding the Fourth Proportional to 1,640.12, 2,461.79 and 1,120.91

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Solution

The fourth proportional to 1,640.12, 2,461.79 and 1,120.91 is: 1,682.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.12 : 2,461.79 = 1,120.91 : x
  2. Step 2: Convert to fraction form
    1,640.12/2,461.79 = 1,120.91/x
  3. Step 3: Cross multiply
    1,640.12x = 2,461.79 × 1,120.91
  4. Step 4: Simplify right side
    1,640.12x = 2,759,435.52
  5. Step 5: Solve for x
    x = 2,759,435.52/1,640.12
  6. Step 6: Final answer
    x = 1,682.46

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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.