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Finding the Fourth Proportional to 443.34, 664.80 and 260.79

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Solution

The fourth proportional to 443.34, 664.80 and 260.79 is: 391.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.34 : 664.80 = 260.79 : x
  2. Step 2: Convert to fraction form
    443.34/664.80 = 260.79/x
  3. Step 3: Cross multiply
    443.34x = 664.80 × 260.79
  4. Step 4: Simplify right side
    443.34x = 173,373.19
  5. Step 5: Solve for x
    x = 173,373.19/443.34
  6. Step 6: Final answer
    x = 391.06

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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.