Home / 1,392.08-2,072.21-1,371.31

Finding the Fourth Proportional to 1,392.08, 2,072.21 and 1,371.31

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Solution

The fourth proportional to 1,392.08, 2,072.21 and 1,371.31 is: 2,041.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.08 : 2,072.21 = 1,371.31 : x
  2. Step 2: Convert to fraction form
    1,392.08/2,072.21 = 1,371.31/x
  3. Step 3: Cross multiply
    1,392.08x = 2,072.21 × 1,371.31
  4. Step 4: Simplify right side
    1,392.08x = 2,841,630.26
  5. Step 5: Solve for x
    x = 2,841,630.26/1,392.08
  6. Step 6: Final answer
    x = 2,041.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.