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Finding the Fourth Proportional to 490.19, 675.74 and 342.36

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Solution

The fourth proportional to 490.19, 675.74 and 342.36 is: 471.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.19 : 675.74 = 342.36 : x
  2. Step 2: Convert to fraction form
    490.19/675.74 = 342.36/x
  3. Step 3: Cross multiply
    490.19x = 675.74 × 342.36
  4. Step 4: Simplify right side
    490.19x = 231,347.20
  5. Step 5: Solve for x
    x = 231,347.20/490.19
  6. Step 6: Final answer
    x = 471.96

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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.