Home / 1,226.12-1,838.72-404.20

Finding the Fourth Proportional to 1,226.12, 1,838.72 and 404.20

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Solution

The fourth proportional to 1,226.12, 1,838.72 and 404.20 is: 606.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.12 : 1,838.72 = 404.20 : x
  2. Step 2: Convert to fraction form
    1,226.12/1,838.72 = 404.20/x
  3. Step 3: Cross multiply
    1,226.12x = 1,838.72 × 404.20
  4. Step 4: Simplify right side
    1,226.12x = 743,210.62
  5. Step 5: Solve for x
    x = 743,210.62/1,226.12
  6. Step 6: Final answer
    x = 606.15

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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.