Home / 2,177.90-3,006.19-1,391.95

Finding the Fourth Proportional to 2,177.90, 3,006.19 and 1,391.95

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Solution

The fourth proportional to 2,177.90, 3,006.19 and 1,391.95 is: 1,921.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,177.90 : 3,006.19 = 1,391.95 : x
  2. Step 2: Convert to fraction form
    2,177.90/3,006.19 = 1,391.95/x
  3. Step 3: Cross multiply
    2,177.90x = 3,006.19 × 1,391.95
  4. Step 4: Simplify right side
    2,177.90x = 4,184,466.17
  5. Step 5: Solve for x
    x = 4,184,466.17/2,177.90
  6. Step 6: Final answer
    x = 1,921.33

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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.