Home / 2,215.91-3,058.22-1,271.81

Finding the Fourth Proportional to 2,215.91, 3,058.22 and 1,271.81

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Solution

The fourth proportional to 2,215.91, 3,058.22 and 1,271.81 is: 1,755.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.91 : 3,058.22 = 1,271.81 : x
  2. Step 2: Convert to fraction form
    2,215.91/3,058.22 = 1,271.81/x
  3. Step 3: Cross multiply
    2,215.91x = 3,058.22 × 1,271.81
  4. Step 4: Simplify right side
    2,215.91x = 3,889,485.60
  5. Step 5: Solve for x
    x = 3,889,485.60/2,215.91
  6. Step 6: Final answer
    x = 1,755.25

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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.