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Finding the Fourth Proportional to 1,028.36, 1,541.07 and 443.21

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Solution

The fourth proportional to 1,028.36, 1,541.07 and 443.21 is: 664.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.36 : 1,541.07 = 443.21 : x
  2. Step 2: Convert to fraction form
    1,028.36/1,541.07 = 443.21/x
  3. Step 3: Cross multiply
    1,028.36x = 1,541.07 × 443.21
  4. Step 4: Simplify right side
    1,028.36x = 683,017.63
  5. Step 5: Solve for x
    x = 683,017.63/1,028.36
  6. Step 6: Final answer
    x = 664.18

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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.