Home / 1,285.56-1,928.70-1,091.93

Finding the Fourth Proportional to 1,285.56, 1,928.70 and 1,091.93

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Solution

The fourth proportional to 1,285.56, 1,928.70 and 1,091.93 is: 1,638.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.56 : 1,928.70 = 1,091.93 : x
  2. Step 2: Convert to fraction form
    1,285.56/1,928.70 = 1,091.93/x
  3. Step 3: Cross multiply
    1,285.56x = 1,928.70 × 1,091.93
  4. Step 4: Simplify right side
    1,285.56x = 2,105,995.75
  5. Step 5: Solve for x
    x = 2,105,995.75/1,285.56
  6. Step 6: Final answer
    x = 1,638.19

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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.