Home / 1,619.64-2,235.03-911.58

Finding the Fourth Proportional to 1,619.64, 2,235.03 and 911.58

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Solution

The fourth proportional to 1,619.64, 2,235.03 and 911.58 is: 1,257.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.64 : 2,235.03 = 911.58 : x
  2. Step 2: Convert to fraction form
    1,619.64/2,235.03 = 911.58/x
  3. Step 3: Cross multiply
    1,619.64x = 2,235.03 × 911.58
  4. Step 4: Simplify right side
    1,619.64x = 2,037,408.65
  5. Step 5: Solve for x
    x = 2,037,408.65/1,619.64
  6. Step 6: Final answer
    x = 1,257.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.