Home / 1,890.56-2,838-1,122.68

Finding the Fourth Proportional to 1,890.56, 2,838 and 1,122.68

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Solution

The fourth proportional to 1,890.56, 2,838 and 1,122.68 is: 1,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.56 : 2,838 = 1,122.68 : x
  2. Step 2: Convert to fraction form
    1,890.56/2,838 = 1,122.68/x
  3. Step 3: Cross multiply
    1,890.56x = 2,838 × 1,122.68
  4. Step 4: Simplify right side
    1,890.56x = 3,186,165.84
  5. Step 5: Solve for x
    x = 3,186,165.84/1,890.56
  6. Step 6: Final answer
    x = 1,685.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.