Home / 2,122.31-2,928.93-1,178.09

Finding the Fourth Proportional to 2,122.31, 2,928.93 and 1,178.09

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Solution

The fourth proportional to 2,122.31, 2,928.93 and 1,178.09 is: 1,625.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.31 : 2,928.93 = 1,178.09 : x
  2. Step 2: Convert to fraction form
    2,122.31/2,928.93 = 1,178.09/x
  3. Step 3: Cross multiply
    2,122.31x = 2,928.93 × 1,178.09
  4. Step 4: Simplify right side
    2,122.31x = 3,450,528.50
  5. Step 5: Solve for x
    x = 3,450,528.50/2,122.31
  6. Step 6: Final answer
    x = 1,625.84

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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.