Home / 3,123-4,682.34-1,890.72

Finding the Fourth Proportional to 3,123, 4,682.34 and 1,890.72

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Solution

The fourth proportional to 3,123, 4,682.34 and 1,890.72 is: 2,834.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123 : 4,682.34 = 1,890.72 : x
  2. Step 2: Convert to fraction form
    3,123/4,682.34 = 1,890.72/x
  3. Step 3: Cross multiply
    3,123x = 4,682.34 × 1,890.72
  4. Step 4: Simplify right side
    3,123x = 8,852,993.88
  5. Step 5: Solve for x
    x = 8,852,993.88/3,123
  6. Step 6: Final answer
    x = 2,834.77

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Double scale
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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.