Home / 1,910.47-2,865.71-1,261.05

Finding the Fourth Proportional to 1,910.47, 2,865.71 and 1,261.05

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Solution

The fourth proportional to 1,910.47, 2,865.71 and 1,261.05 is: 1,891.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.47 : 2,865.71 = 1,261.05 : x
  2. Step 2: Convert to fraction form
    1,910.47/2,865.71 = 1,261.05/x
  3. Step 3: Cross multiply
    1,910.47x = 2,865.71 × 1,261.05
  4. Step 4: Simplify right side
    1,910.47x = 3,613,810.40
  5. Step 5: Solve for x
    x = 3,613,810.40/1,910.47
  6. Step 6: Final answer
    x = 1,891.58

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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.