Home / 2,178.98-3,005.88-1,392.20

Finding the Fourth Proportional to 2,178.98, 3,005.88 and 1,392.20

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Solution

The fourth proportional to 2,178.98, 3,005.88 and 1,392.20 is: 1,920.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.98 : 3,005.88 = 1,392.20 : x
  2. Step 2: Convert to fraction form
    2,178.98/3,005.88 = 1,392.20/x
  3. Step 3: Cross multiply
    2,178.98x = 3,005.88 × 1,392.20
  4. Step 4: Simplify right side
    2,178.98x = 4,184,786.14
  5. Step 5: Solve for x
    x = 4,184,786.14/2,178.98
  6. Step 6: Final answer
    x = 1,920.53

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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.