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Finding the Fourth Proportional to 490.48, 676.95 and 293.98

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Solution

The fourth proportional to 490.48, 676.95 and 293.98 is: 405.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.48 : 676.95 = 293.98 : x
  2. Step 2: Convert to fraction form
    490.48/676.95 = 293.98/x
  3. Step 3: Cross multiply
    490.48x = 676.95 × 293.98
  4. Step 4: Simplify right side
    490.48x = 199,009.76
  5. Step 5: Solve for x
    x = 199,009.76/490.48
  6. Step 6: Final answer
    x = 405.74

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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.