Home / 1,619.71-2,235.26-911.50

Finding the Fourth Proportional to 1,619.71, 2,235.26 and 911.50

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Solution

The fourth proportional to 1,619.71, 2,235.26 and 911.50 is: 1,257.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.71 : 2,235.26 = 911.50 : x
  2. Step 2: Convert to fraction form
    1,619.71/2,235.26 = 911.50/x
  3. Step 3: Cross multiply
    1,619.71x = 2,235.26 × 911.50
  4. Step 4: Simplify right side
    1,619.71x = 2,037,439.49
  5. Step 5: Solve for x
    x = 2,037,439.49/1,619.71
  6. Step 6: Final answer
    x = 1,257.90

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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.