Home / 1,392.09-2,077.97-1,289.31

Finding the Fourth Proportional to 1,392.09, 2,077.97 and 1,289.31

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Solution

The fourth proportional to 1,392.09, 2,077.97 and 1,289.31 is: 1,924.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.09 : 2,077.97 = 1,289.31 : x
  2. Step 2: Convert to fraction form
    1,392.09/2,077.97 = 1,289.31/x
  3. Step 3: Cross multiply
    1,392.09x = 2,077.97 × 1,289.31
  4. Step 4: Simplify right side
    1,392.09x = 2,679,150.72
  5. Step 5: Solve for x
    x = 2,679,150.72/1,392.09
  6. Step 6: Final answer
    x = 1,924.55

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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.