Home / 1,583.19-2,185.23-911.07

Finding the Fourth Proportional to 1,583.19, 2,185.23 and 911.07

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Solution

The fourth proportional to 1,583.19, 2,185.23 and 911.07 is: 1,257.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,583.19 : 2,185.23 = 911.07 : x
  2. Step 2: Convert to fraction form
    1,583.19/2,185.23 = 911.07/x
  3. Step 3: Cross multiply
    1,583.19x = 2,185.23 × 911.07
  4. Step 4: Simplify right side
    1,583.19x = 1,990,899.89
  5. Step 5: Solve for x
    x = 1,990,899.89/1,583.19
  6. Step 6: Final answer
    x = 1,257.52

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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.