Home / 1,911.12-2,638.08-1,861.44

Finding the Fourth Proportional to 1,911.12, 2,638.08 and 1,861.44

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Solution

The fourth proportional to 1,911.12, 2,638.08 and 1,861.44 is: 2,569.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.12 : 2,638.08 = 1,861.44 : x
  2. Step 2: Convert to fraction form
    1,911.12/2,638.08 = 1,861.44/x
  3. Step 3: Cross multiply
    1,911.12x = 2,638.08 × 1,861.44
  4. Step 4: Simplify right side
    1,911.12x = 4,910,627.64
  5. Step 5: Solve for x
    x = 4,910,627.64/1,911.12
  6. Step 6: Final answer
    x = 2,569.50

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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.