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Finding the Fourth Proportional to 443.29, 608.49 and 393.07

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Solution

The fourth proportional to 443.29, 608.49 and 393.07 is: 539.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.29 : 608.49 = 393.07 : x
  2. Step 2: Convert to fraction form
    443.29/608.49 = 393.07/x
  3. Step 3: Cross multiply
    443.29x = 608.49 × 393.07
  4. Step 4: Simplify right side
    443.29x = 239,178.18
  5. Step 5: Solve for x
    x = 239,178.18/443.29
  6. Step 6: Final answer
    x = 539.55

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.