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Finding the Fourth Proportional to 573.63, 791.67 and 399.34

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Solution

The fourth proportional to 573.63, 791.67 and 399.34 is: 551.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.63 : 791.67 = 399.34 : x
  2. Step 2: Convert to fraction form
    573.63/791.67 = 399.34/x
  3. Step 3: Cross multiply
    573.63x = 791.67 × 399.34
  4. Step 4: Simplify right side
    573.63x = 316,145.50
  5. Step 5: Solve for x
    x = 316,145.50/573.63
  6. Step 6: Final answer
    x = 551.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.