Home / 3,138.01-4,705.39-1,288.78

Finding the Fourth Proportional to 3,138.01, 4,705.39 and 1,288.78

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Solution

The fourth proportional to 3,138.01, 4,705.39 and 1,288.78 is: 1,932.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.01 : 4,705.39 = 1,288.78 : x
  2. Step 2: Convert to fraction form
    3,138.01/4,705.39 = 1,288.78/x
  3. Step 3: Cross multiply
    3,138.01x = 4,705.39 × 1,288.78
  4. Step 4: Simplify right side
    3,138.01x = 6,064,212.52
  5. Step 5: Solve for x
    x = 6,064,212.52/3,138.01
  6. Step 6: Final answer
    x = 1,932.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.