Home / 2,120.93-2,928.64-1,376.17

Finding the Fourth Proportional to 2,120.93, 2,928.64 and 1,376.17

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Solution

The fourth proportional to 2,120.93, 2,928.64 and 1,376.17 is: 1,900.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.93 : 2,928.64 = 1,376.17 : x
  2. Step 2: Convert to fraction form
    2,120.93/2,928.64 = 1,376.17/x
  3. Step 3: Cross multiply
    2,120.93x = 2,928.64 × 1,376.17
  4. Step 4: Simplify right side
    2,120.93x = 4,030,314.80
  5. Step 5: Solve for x
    x = 4,030,314.80/2,120.93
  6. Step 6: Final answer
    x = 1,900.25

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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.