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Finding the Fourth Proportional to 395.79, 594.59 and 280.51

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Solution

The fourth proportional to 395.79, 594.59 and 280.51 is: 421.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.79 : 594.59 = 280.51 : x
  2. Step 2: Convert to fraction form
    395.79/594.59 = 280.51/x
  3. Step 3: Cross multiply
    395.79x = 594.59 × 280.51
  4. Step 4: Simplify right side
    395.79x = 166,790.47
  5. Step 5: Solve for x
    x = 166,790.47/395.79
  6. Step 6: Final answer
    x = 421.42

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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.