Home / 2,071.74-2,858.68-1,187.40

Finding the Fourth Proportional to 2,071.74, 2,858.68 and 1,187.40

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Solution

The fourth proportional to 2,071.74, 2,858.68 and 1,187.40 is: 1,638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.74 : 2,858.68 = 1,187.40 : x
  2. Step 2: Convert to fraction form
    2,071.74/2,858.68 = 1,187.40/x
  3. Step 3: Cross multiply
    2,071.74x = 2,858.68 × 1,187.40
  4. Step 4: Simplify right side
    2,071.74x = 3,394,396.63
  5. Step 5: Solve for x
    x = 3,394,396.63/2,071.74
  6. Step 6: Final answer
    x = 1,638.43

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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.