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Finding the Fourth Proportional to 320.98, 479.15 and 298.48

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Solution

The fourth proportional to 320.98, 479.15 and 298.48 is: 445.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.98 : 479.15 = 298.48 : x
  2. Step 2: Convert to fraction form
    320.98/479.15 = 298.48/x
  3. Step 3: Cross multiply
    320.98x = 479.15 × 298.48
  4. Step 4: Simplify right side
    320.98x = 143,016.69
  5. Step 5: Solve for x
    x = 143,016.69/320.98
  6. Step 6: Final answer
    x = 445.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.