Home / 1,618.38-2,233.36-919.75

Finding the Fourth Proportional to 1,618.38, 2,233.36 and 919.75

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Solution

The fourth proportional to 1,618.38, 2,233.36 and 919.75 is: 1,269.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.38 : 2,233.36 = 919.75 : x
  2. Step 2: Convert to fraction form
    1,618.38/2,233.36 = 919.75/x
  3. Step 3: Cross multiply
    1,618.38x = 2,233.36 × 919.75
  4. Step 4: Simplify right side
    1,618.38x = 2,054,132.86
  5. Step 5: Solve for x
    x = 2,054,132.86/1,618.38
  6. Step 6: Final answer
    x = 1,269.25

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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.