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Finding the Fourth Proportional to 591.42, 816.31 and 342.88

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Solution

The fourth proportional to 591.42, 816.31 and 342.88 is: 473.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.42 : 816.31 = 342.88 : x
  2. Step 2: Convert to fraction form
    591.42/816.31 = 342.88/x
  3. Step 3: Cross multiply
    591.42x = 816.31 × 342.88
  4. Step 4: Simplify right side
    591.42x = 279,896.37
  5. Step 5: Solve for x
    x = 279,896.37/591.42
  6. Step 6: Final answer
    x = 473.26

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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.