Home / 1,619.53-2,234.31-911.21

Finding the Fourth Proportional to 1,619.53, 2,234.31 and 911.21

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Solution

The fourth proportional to 1,619.53, 2,234.31 and 911.21 is: 1,257.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.53 : 2,234.31 = 911.21 : x
  2. Step 2: Convert to fraction form
    1,619.53/2,234.31 = 911.21/x
  3. Step 3: Cross multiply
    1,619.53x = 2,234.31 × 911.21
  4. Step 4: Simplify right side
    1,619.53x = 2,035,925.62
  5. Step 5: Solve for x
    x = 2,035,925.62/1,619.53
  6. Step 6: Final answer
    x = 1,257.11

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1.5x scale

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.