Home / 3,110.70-4,291.47-1,930.95

Finding the Fourth Proportional to 3,110.70, 4,291.47 and 1,930.95

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Solution

The fourth proportional to 3,110.70, 4,291.47 and 1,930.95 is: 2,663.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.70 : 4,291.47 = 1,930.95 : x
  2. Step 2: Convert to fraction form
    3,110.70/4,291.47 = 1,930.95/x
  3. Step 3: Cross multiply
    3,110.70x = 4,291.47 × 1,930.95
  4. Step 4: Simplify right side
    3,110.70x = 8,286,614.00
  5. Step 5: Solve for x
    x = 8,286,614.00/3,110.70
  6. Step 6: Final answer
    x = 2,663.91

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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.