Home / 3,105.06-4,658.40-1,872.78

Finding the Fourth Proportional to 3,105.06, 4,658.40 and 1,872.78

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Solution

The fourth proportional to 3,105.06, 4,658.40 and 1,872.78 is: 2,809.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.06 : 4,658.40 = 1,872.78 : x
  2. Step 2: Convert to fraction form
    3,105.06/4,658.40 = 1,872.78/x
  3. Step 3: Cross multiply
    3,105.06x = 4,658.40 × 1,872.78
  4. Step 4: Simplify right side
    3,105.06x = 8,724,158.35
  5. Step 5: Solve for x
    x = 8,724,158.35/3,105.06
  6. Step 6: Final answer
    x = 2,809.66

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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.