Home / 1,911.96-2,638.87-1,126.44

Finding the Fourth Proportional to 1,911.96, 2,638.87 and 1,126.44

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Solution

The fourth proportional to 1,911.96, 2,638.87 and 1,126.44 is: 1,554.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.96 : 2,638.87 = 1,126.44 : x
  2. Step 2: Convert to fraction form
    1,911.96/2,638.87 = 1,126.44/x
  3. Step 3: Cross multiply
    1,911.96x = 2,638.87 × 1,126.44
  4. Step 4: Simplify right side
    1,911.96x = 2,972,528.72
  5. Step 5: Solve for x
    x = 2,972,528.72/1,911.96
  6. Step 6: Final answer
    x = 1,554.70

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1.5x scale

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.