Home / 1,261.89-1,890.06-1,155.27

Finding the Fourth Proportional to 1,261.89, 1,890.06 and 1,155.27

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Solution

The fourth proportional to 1,261.89, 1,890.06 and 1,155.27 is: 1,730.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.89 : 1,890.06 = 1,155.27 : x
  2. Step 2: Convert to fraction form
    1,261.89/1,890.06 = 1,155.27/x
  3. Step 3: Cross multiply
    1,261.89x = 1,890.06 × 1,155.27
  4. Step 4: Simplify right side
    1,261.89x = 2,183,529.62
  5. Step 5: Solve for x
    x = 2,183,529.62/1,261.89
  6. Step 6: Final answer
    x = 1,730.36

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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.