Home / 2,071.68-2,858.82-1,187.70

Finding the Fourth Proportional to 2,071.68, 2,858.82 and 1,187.70

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Solution

The fourth proportional to 2,071.68, 2,858.82 and 1,187.70 is: 1,638.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.68 : 2,858.82 = 1,187.70 : x
  2. Step 2: Convert to fraction form
    2,071.68/2,858.82 = 1,187.70/x
  3. Step 3: Cross multiply
    2,071.68x = 2,858.82 × 1,187.70
  4. Step 4: Simplify right side
    2,071.68x = 3,395,420.51
  5. Step 5: Solve for x
    x = 3,395,420.51/2,071.68
  6. Step 6: Final answer
    x = 1,638.97

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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.