Home / 1,647.14-2,272.94-939.10

Finding the Fourth Proportional to 1,647.14, 2,272.94 and 939.10

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Solution

The fourth proportional to 1,647.14, 2,272.94 and 939.10 is: 1,295.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647.14 : 2,272.94 = 939.10 : x
  2. Step 2: Convert to fraction form
    1,647.14/2,272.94 = 939.10/x
  3. Step 3: Cross multiply
    1,647.14x = 2,272.94 × 939.10
  4. Step 4: Simplify right side
    1,647.14x = 2,134,520.26
  5. Step 5: Solve for x
    x = 2,134,520.26/1,647.14
  6. Step 6: Final answer
    x = 1,295.89

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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.