Home / 1,896.10-2,615.59-1,187.79

Finding the Fourth Proportional to 1,896.10, 2,615.59 and 1,187.79

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Solution

The fourth proportional to 1,896.10, 2,615.59 and 1,187.79 is: 1,638.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,896.10 : 2,615.59 = 1,187.79 : x
  2. Step 2: Convert to fraction form
    1,896.10/2,615.59 = 1,187.79/x
  3. Step 3: Cross multiply
    1,896.10x = 2,615.59 × 1,187.79
  4. Step 4: Simplify right side
    1,896.10x = 3,106,771.35
  5. Step 5: Solve for x
    x = 3,106,771.35/1,896.10
  6. Step 6: Final answer
    x = 1,638.51

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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.