Home / 2,865.31-3,955.44-2,085.28

Finding the Fourth Proportional to 2,865.31, 3,955.44 and 2,085.28

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Solution

The fourth proportional to 2,865.31, 3,955.44 and 2,085.28 is: 2,878.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.31 : 3,955.44 = 2,085.28 : x
  2. Step 2: Convert to fraction form
    2,865.31/3,955.44 = 2,085.28/x
  3. Step 3: Cross multiply
    2,865.31x = 3,955.44 × 2,085.28
  4. Step 4: Simplify right side
    2,865.31x = 8,248,199.92
  5. Step 5: Solve for x
    x = 8,248,199.92/2,865.31
  6. Step 6: Final answer
    x = 2,878.64

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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.