Home / 2,840.79-3,918.47-1,833.78

Finding the Fourth Proportional to 2,840.79, 3,918.47 and 1,833.78

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Solution

The fourth proportional to 2,840.79, 3,918.47 and 1,833.78 is: 2,529.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.79 : 3,918.47 = 1,833.78 : x
  2. Step 2: Convert to fraction form
    2,840.79/3,918.47 = 1,833.78/x
  3. Step 3: Cross multiply
    2,840.79x = 3,918.47 × 1,833.78
  4. Step 4: Simplify right side
    2,840.79x = 7,185,617.44
  5. Step 5: Solve for x
    x = 7,185,617.44/2,840.79
  6. Step 6: Final answer
    x = 2,529.44

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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.