Home / 1,805.15-2,706.20-1,111.79

Finding the Fourth Proportional to 1,805.15, 2,706.20 and 1,111.79

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Solution

The fourth proportional to 1,805.15, 2,706.20 and 1,111.79 is: 1,666.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.15 : 2,706.20 = 1,111.79 : x
  2. Step 2: Convert to fraction form
    1,805.15/2,706.20 = 1,111.79/x
  3. Step 3: Cross multiply
    1,805.15x = 2,706.20 × 1,111.79
  4. Step 4: Simplify right side
    1,805.15x = 3,008,707.01
  5. Step 5: Solve for x
    x = 3,008,707.01/1,805.15
  6. Step 6: Final answer
    x = 1,666.74

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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.