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Finding the Fourth Proportional to 443.70, 612.18 and 303.54

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Solution

The fourth proportional to 443.70, 612.18 and 303.54 is: 418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.70 : 612.18 = 303.54 : x
  2. Step 2: Convert to fraction form
    443.70/612.18 = 303.54/x
  3. Step 3: Cross multiply
    443.70x = 612.18 × 303.54
  4. Step 4: Simplify right side
    443.70x = 185,821.12
  5. Step 5: Solve for x
    x = 185,821.12/443.70
  6. Step 6: Final answer
    x = 418.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.