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Finding the Fourth Proportional to 443.33, 660.60 and 394.87

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Solution

The fourth proportional to 443.33, 660.60 and 394.87 is: 588.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.33 : 660.60 = 394.87 : x
  2. Step 2: Convert to fraction form
    443.33/660.60 = 394.87/x
  3. Step 3: Cross multiply
    443.33x = 660.60 × 394.87
  4. Step 4: Simplify right side
    443.33x = 260,851.12
  5. Step 5: Solve for x
    x = 260,851.12/443.33
  6. Step 6: Final answer
    x = 588.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.