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Finding the Fourth Proportional to 473.67, 711.09 and 393.48

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Solution

The fourth proportional to 473.67, 711.09 and 393.48 is: 590.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.67 : 711.09 = 393.48 : x
  2. Step 2: Convert to fraction form
    473.67/711.09 = 393.48/x
  3. Step 3: Cross multiply
    473.67x = 711.09 × 393.48
  4. Step 4: Simplify right side
    473.67x = 279,799.69
  5. Step 5: Solve for x
    x = 279,799.69/473.67
  6. Step 6: Final answer
    x = 590.71

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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.