Home / 2,071.22-2,858.40-1,187.17

Finding the Fourth Proportional to 2,071.22, 2,858.40 and 1,187.17

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Solution

The fourth proportional to 2,071.22, 2,858.40 and 1,187.17 is: 1,638.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.22 : 2,858.40 = 1,187.17 : x
  2. Step 2: Convert to fraction form
    2,071.22/2,858.40 = 1,187.17/x
  3. Step 3: Cross multiply
    2,071.22x = 2,858.40 × 1,187.17
  4. Step 4: Simplify right side
    2,071.22x = 3,393,406.73
  5. Step 5: Solve for x
    x = 3,393,406.73/2,071.22
  6. Step 6: Final answer
    x = 1,638.36

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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.