Home / 2,071.31-2,858.49-1,187.19

Finding the Fourth Proportional to 2,071.31, 2,858.49 and 1,187.19

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Solution

The fourth proportional to 2,071.31, 2,858.49 and 1,187.19 is: 1,638.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.31 : 2,858.49 = 1,187.19 : x
  2. Step 2: Convert to fraction form
    2,071.31/2,858.49 = 1,187.19/x
  3. Step 3: Cross multiply
    2,071.31x = 2,858.49 × 1,187.19
  4. Step 4: Simplify right side
    2,071.31x = 3,393,570.74
  5. Step 5: Solve for x
    x = 3,393,570.74/2,071.31
  6. Step 6: Final answer
    x = 1,638.37

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,072.31, 2,859.87 and 1,188.19
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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.