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Finding the Fourth Proportional to 489.83, 675.97 and 303.32

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Solution

The fourth proportional to 489.83, 675.97 and 303.32 is: 418.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.83 : 675.97 = 303.32 : x
  2. Step 2: Convert to fraction form
    489.83/675.97 = 303.32/x
  3. Step 3: Cross multiply
    489.83x = 675.97 × 303.32
  4. Step 4: Simplify right side
    489.83x = 205,036.15
  5. Step 5: Solve for x
    x = 205,036.15/489.83
  6. Step 6: Final answer
    x = 418.59

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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.