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Finding the Fourth Proportional to 591.26, 815.90 and 342.56

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Solution

The fourth proportional to 591.26, 815.90 and 342.56 is: 472.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.26 : 815.90 = 342.56 : x
  2. Step 2: Convert to fraction form
    591.26/815.90 = 342.56/x
  3. Step 3: Cross multiply
    591.26x = 815.90 × 342.56
  4. Step 4: Simplify right side
    591.26x = 279,495.56
  5. Step 5: Solve for x
    x = 279,495.56/591.26
  6. Step 6: Final answer
    x = 472.71

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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.