Home / 1,939.80-2,905.34-1,505.64

Finding the Fourth Proportional to 1,939.80, 2,905.34 and 1,505.64

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Solution

The fourth proportional to 1,939.80, 2,905.34 and 1,505.64 is: 2,255.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.80 : 2,905.34 = 1,505.64 : x
  2. Step 2: Convert to fraction form
    1,939.80/2,905.34 = 1,505.64/x
  3. Step 3: Cross multiply
    1,939.80x = 2,905.34 × 1,505.64
  4. Step 4: Simplify right side
    1,939.80x = 4,374,396.12
  5. Step 5: Solve for x
    x = 4,374,396.12/1,939.80
  6. Step 6: Final answer
    x = 2,255.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.