Home / 2,185.80-3,015.63-1,400.28

Finding the Fourth Proportional to 2,185.80, 3,015.63 and 1,400.28

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Solution

The fourth proportional to 2,185.80, 3,015.63 and 1,400.28 is: 1,931.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.80 : 3,015.63 = 1,400.28 : x
  2. Step 2: Convert to fraction form
    2,185.80/3,015.63 = 1,400.28/x
  3. Step 3: Cross multiply
    2,185.80x = 3,015.63 × 1,400.28
  4. Step 4: Simplify right side
    2,185.80x = 4,222,726.38
  5. Step 5: Solve for x
    x = 4,222,726.38/2,185.80
  6. Step 6: Final answer
    x = 1,931.89

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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.