Home / 1,891.09-2,607.91-1,261.68

Finding the Fourth Proportional to 1,891.09, 2,607.91 and 1,261.68

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Solution

The fourth proportional to 1,891.09, 2,607.91 and 1,261.68 is: 1,739.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.09 : 2,607.91 = 1,261.68 : x
  2. Step 2: Convert to fraction form
    1,891.09/2,607.91 = 1,261.68/x
  3. Step 3: Cross multiply
    1,891.09x = 2,607.91 × 1,261.68
  4. Step 4: Simplify right side
    1,891.09x = 3,290,347.89
  5. Step 5: Solve for x
    x = 3,290,347.89/1,891.09
  6. Step 6: Final answer
    x = 1,739.92

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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.