Home / 1,548.78-2,137.21-850.15

Finding the Fourth Proportional to 1,548.78, 2,137.21 and 850.15

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Solution

The fourth proportional to 1,548.78, 2,137.21 and 850.15 is: 1,173.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,548.78 : 2,137.21 = 850.15 : x
  2. Step 2: Convert to fraction form
    1,548.78/2,137.21 = 850.15/x
  3. Step 3: Cross multiply
    1,548.78x = 2,137.21 × 850.15
  4. Step 4: Simplify right side
    1,548.78x = 1,816,949.08
  5. Step 5: Solve for x
    x = 1,816,949.08/1,548.78
  6. Step 6: Final answer
    x = 1,173.15

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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.