Home / 2,856.63-3,939.53-1,861.55

Finding the Fourth Proportional to 2,856.63, 3,939.53 and 1,861.55

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Solution

The fourth proportional to 2,856.63, 3,939.53 and 1,861.55 is: 2,567.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.63 : 3,939.53 = 1,861.55 : x
  2. Step 2: Convert to fraction form
    2,856.63/3,939.53 = 1,861.55/x
  3. Step 3: Cross multiply
    2,856.63x = 3,939.53 × 1,861.55
  4. Step 4: Simplify right side
    2,856.63x = 7,333,603.07
  5. Step 5: Solve for x
    x = 7,333,603.07/2,856.63
  6. Step 6: Final answer
    x = 2,567.22

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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.