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Finding the Fourth Proportional to 590.67, 815.82 and 393.84

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Solution

The fourth proportional to 590.67, 815.82 and 393.84 is: 543.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.67 : 815.82 = 393.84 : x
  2. Step 2: Convert to fraction form
    590.67/815.82 = 393.84/x
  3. Step 3: Cross multiply
    590.67x = 815.82 × 393.84
  4. Step 4: Simplify right side
    590.67x = 321,302.55
  5. Step 5: Solve for x
    x = 321,302.55/590.67
  6. Step 6: Final answer
    x = 543.96

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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.