Home / 2,855.52-4,280.40-1,123.20

Finding the Fourth Proportional to 2,855.52, 4,280.40 and 1,123.20

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Solution

The fourth proportional to 2,855.52, 4,280.40 and 1,123.20 is: 1,683.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.52 : 4,280.40 = 1,123.20 : x
  2. Step 2: Convert to fraction form
    2,855.52/4,280.40 = 1,123.20/x
  3. Step 3: Cross multiply
    2,855.52x = 4,280.40 × 1,123.20
  4. Step 4: Simplify right side
    2,855.52x = 4,807,745.28
  5. Step 5: Solve for x
    x = 4,807,745.28/2,855.52
  6. Step 6: Final answer
    x = 1,683.67

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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.