Home / 1,868.32-2,578.19-1,071.09

Finding the Fourth Proportional to 1,868.32, 2,578.19 and 1,071.09

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Solution

The fourth proportional to 1,868.32, 2,578.19 and 1,071.09 is: 1,478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.32 : 2,578.19 = 1,071.09 : x
  2. Step 2: Convert to fraction form
    1,868.32/2,578.19 = 1,071.09/x
  3. Step 3: Cross multiply
    1,868.32x = 2,578.19 × 1,071.09
  4. Step 4: Simplify right side
    1,868.32x = 2,761,465.08
  5. Step 5: Solve for x
    x = 2,761,465.08/1,868.32
  6. Step 6: Final answer
    x = 1,478.05

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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.