Home / 1,423.84-1,961.94-1,109.20

Finding the Fourth Proportional to 1,423.84, 1,961.94 and 1,109.20

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Solution

The fourth proportional to 1,423.84, 1,961.94 and 1,109.20 is: 1,528.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.84 : 1,961.94 = 1,109.20 : x
  2. Step 2: Convert to fraction form
    1,423.84/1,961.94 = 1,109.20/x
  3. Step 3: Cross multiply
    1,423.84x = 1,961.94 × 1,109.20
  4. Step 4: Simplify right side
    1,423.84x = 2,176,183.85
  5. Step 5: Solve for x
    x = 2,176,183.85/1,423.84
  6. Step 6: Final answer
    x = 1,528.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.