Home / 1,442.94-1,991.60-1,396.81

Finding the Fourth Proportional to 1,442.94, 1,991.60 and 1,396.81

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Solution

The fourth proportional to 1,442.94, 1,991.60 and 1,396.81 is: 1,927.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.94 : 1,991.60 = 1,396.81 : x
  2. Step 2: Convert to fraction form
    1,442.94/1,991.60 = 1,396.81/x
  3. Step 3: Cross multiply
    1,442.94x = 1,991.60 × 1,396.81
  4. Step 4: Simplify right side
    1,442.94x = 2,781,886.80
  5. Step 5: Solve for x
    x = 2,781,886.80/1,442.94
  6. Step 6: Final answer
    x = 1,927.93

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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.