Home / 2,165.78-2,988.33-1,379.54

Finding the Fourth Proportional to 2,165.78, 2,988.33 and 1,379.54

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Solution

The fourth proportional to 2,165.78, 2,988.33 and 1,379.54 is: 1,903.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.78 : 2,988.33 = 1,379.54 : x
  2. Step 2: Convert to fraction form
    2,165.78/2,988.33 = 1,379.54/x
  3. Step 3: Cross multiply
    2,165.78x = 2,988.33 × 1,379.54
  4. Step 4: Simplify right side
    2,165.78x = 4,122,520.77
  5. Step 5: Solve for x
    x = 4,122,520.77/2,165.78
  6. Step 6: Final answer
    x = 1,903.48

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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.