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Finding the Fourth Proportional to 443.83, 665.60 and 290.57

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Solution

The fourth proportional to 443.83, 665.60 and 290.57 is: 435.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.83 : 665.60 = 290.57 : x
  2. Step 2: Convert to fraction form
    443.83/665.60 = 290.57/x
  3. Step 3: Cross multiply
    443.83x = 665.60 × 290.57
  4. Step 4: Simplify right side
    443.83x = 193,403.39
  5. Step 5: Solve for x
    x = 193,403.39/443.83
  6. Step 6: Final answer
    x = 435.76

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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.