Home / 1,913.27-2,865.35-1,328.85

Finding the Fourth Proportional to 1,913.27, 2,865.35 and 1,328.85

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Solution

The fourth proportional to 1,913.27, 2,865.35 and 1,328.85 is: 1,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.27 : 2,865.35 = 1,328.85 : x
  2. Step 2: Convert to fraction form
    1,913.27/2,865.35 = 1,328.85/x
  3. Step 3: Cross multiply
    1,913.27x = 2,865.35 × 1,328.85
  4. Step 4: Simplify right side
    1,913.27x = 3,807,620.87
  5. Step 5: Solve for x
    x = 3,807,620.87/1,913.27
  6. Step 6: Final answer
    x = 1,990.11

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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.