Home / 2,164.78-2,986.95-1,378.54

Finding the Fourth Proportional to 2,164.78, 2,986.95 and 1,378.54

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Solution

The fourth proportional to 2,164.78, 2,986.95 and 1,378.54 is: 1,902.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.78 : 2,986.95 = 1,378.54 : x
  2. Step 2: Convert to fraction form
    2,164.78/2,986.95 = 1,378.54/x
  3. Step 3: Cross multiply
    2,164.78x = 2,986.95 × 1,378.54
  4. Step 4: Simplify right side
    2,164.78x = 4,117,630.05
  5. Step 5: Solve for x
    x = 4,117,630.05/2,164.78
  6. Step 6: Final answer
    x = 1,902.10

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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.