Home / 1,618.28-2,232.74-919.72

Finding the Fourth Proportional to 1,618.28, 2,232.74 and 919.72

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Solution

The fourth proportional to 1,618.28, 2,232.74 and 919.72 is: 1,268.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.28 : 2,232.74 = 919.72 : x
  2. Step 2: Convert to fraction form
    1,618.28/2,232.74 = 919.72/x
  3. Step 3: Cross multiply
    1,618.28x = 2,232.74 × 919.72
  4. Step 4: Simplify right side
    1,618.28x = 2,053,495.63
  5. Step 5: Solve for x
    x = 2,053,495.63/1,618.28
  6. Step 6: Final answer
    x = 1,268.94

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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.