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Finding the Fourth Proportional to 1,226.49, 1,839.72 and 446.49

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Solution

The fourth proportional to 1,226.49, 1,839.72 and 446.49 is: 669.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.49 : 1,839.72 = 446.49 : x
  2. Step 2: Convert to fraction form
    1,226.49/1,839.72 = 446.49/x
  3. Step 3: Cross multiply
    1,226.49x = 1,839.72 × 446.49
  4. Step 4: Simplify right side
    1,226.49x = 821,416.58
  5. Step 5: Solve for x
    x = 821,416.58/1,226.49
  6. Step 6: Final answer
    x = 669.73

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Double scale
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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.