Home / 2,125.14-2,930.78-1,378.36

Finding the Fourth Proportional to 2,125.14, 2,930.78 and 1,378.36

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Solution

The fourth proportional to 2,125.14, 2,930.78 and 1,378.36 is: 1,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.14 : 2,930.78 = 1,378.36 : x
  2. Step 2: Convert to fraction form
    2,125.14/2,930.78 = 1,378.36/x
  3. Step 3: Cross multiply
    2,125.14x = 2,930.78 × 1,378.36
  4. Step 4: Simplify right side
    2,125.14x = 4,039,669.92
  5. Step 5: Solve for x
    x = 4,039,669.92/2,125.14
  6. Step 6: Final answer
    x = 1,900.90

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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.