Home / 1,226.40-1,839.80-404.50

Finding the Fourth Proportional to 1,226.40, 1,839.80 and 404.50

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Solution

The fourth proportional to 1,226.40, 1,839.80 and 404.50 is: 606.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.40 : 1,839.80 = 404.50 : x
  2. Step 2: Convert to fraction form
    1,226.40/1,839.80 = 404.50/x
  3. Step 3: Cross multiply
    1,226.40x = 1,839.80 × 404.50
  4. Step 4: Simplify right side
    1,226.40x = 744,199.10
  5. Step 5: Solve for x
    x = 744,199.10/1,226.40
  6. Step 6: Final answer
    x = 606.82

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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.