Home / 2,152.29-3,228.77-919.70

Finding the Fourth Proportional to 2,152.29, 3,228.77 and 919.70

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Solution

The fourth proportional to 2,152.29, 3,228.77 and 919.70 is: 1,379.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.29 : 3,228.77 = 919.70 : x
  2. Step 2: Convert to fraction form
    2,152.29/3,228.77 = 919.70/x
  3. Step 3: Cross multiply
    2,152.29x = 3,228.77 × 919.70
  4. Step 4: Simplify right side
    2,152.29x = 2,969,499.77
  5. Step 5: Solve for x
    x = 2,969,499.77/2,152.29
  6. Step 6: Final answer
    x = 1,379.69

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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.