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Finding the Fourth Proportional to 443.79, 664.33 and 346.59

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Solution

The fourth proportional to 443.79, 664.33 and 346.59 is: 518.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.79 : 664.33 = 346.59 : x
  2. Step 2: Convert to fraction form
    443.79/664.33 = 346.59/x
  3. Step 3: Cross multiply
    443.79x = 664.33 × 346.59
  4. Step 4: Simplify right side
    443.79x = 230,250.13
  5. Step 5: Solve for x
    x = 230,250.13/443.79
  6. Step 6: Final answer
    x = 518.83

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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.