Home / 1,678.12-2,309.01-1,378.27

Finding the Fourth Proportional to 1,678.12, 2,309.01 and 1,378.27

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Solution

The fourth proportional to 1,678.12, 2,309.01 and 1,378.27 is: 1,896.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.12 : 2,309.01 = 1,378.27 : x
  2. Step 2: Convert to fraction form
    1,678.12/2,309.01 = 1,378.27/x
  3. Step 3: Cross multiply
    1,678.12x = 2,309.01 × 1,378.27
  4. Step 4: Simplify right side
    1,678.12x = 3,182,439.21
  5. Step 5: Solve for x
    x = 3,182,439.21/1,678.12
  6. Step 6: Final answer
    x = 1,896.43

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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.