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Finding the Fourth Proportional to 1,549.58, 2,137.48 and 919.69

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Solution

The fourth proportional to 1,549.58, 2,137.48 and 919.69 is: 1,268.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.58 : 2,137.48 = 919.69 : x
  2. Step 2: Convert to fraction form
    1,549.58/2,137.48 = 919.69/x
  3. Step 3: Cross multiply
    1,549.58x = 2,137.48 × 919.69
  4. Step 4: Simplify right side
    1,549.58x = 1,965,824.32
  5. Step 5: Solve for x
    x = 1,965,824.32/1,549.58
  6. Step 6: Final answer
    x = 1,268.62

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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.