Home / 2,178.25-3,005.16-1,338.28

Finding the Fourth Proportional to 2,178.25, 3,005.16 and 1,338.28

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Solution

The fourth proportional to 2,178.25, 3,005.16 and 1,338.28 is: 1,846.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.25 : 3,005.16 = 1,338.28 : x
  2. Step 2: Convert to fraction form
    2,178.25/3,005.16 = 1,338.28/x
  3. Step 3: Cross multiply
    2,178.25x = 3,005.16 × 1,338.28
  4. Step 4: Simplify right side
    2,178.25x = 4,021,723.81
  5. Step 5: Solve for x
    x = 4,021,723.81/2,178.25
  6. Step 6: Final answer
    x = 1,846.31

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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.