Home / 2,122.39-2,928.89-1,178.32

Finding the Fourth Proportional to 2,122.39, 2,928.89 and 1,178.32

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Solution

The fourth proportional to 2,122.39, 2,928.89 and 1,178.32 is: 1,626.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.39 : 2,928.89 = 1,178.32 : x
  2. Step 2: Convert to fraction form
    2,122.39/2,928.89 = 1,178.32/x
  3. Step 3: Cross multiply
    2,122.39x = 2,928.89 × 1,178.32
  4. Step 4: Simplify right side
    2,122.39x = 3,451,169.66
  5. Step 5: Solve for x
    x = 3,451,169.66/2,122.39
  6. Step 6: Final answer
    x = 1,626.08

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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.