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Finding the Fourth Proportional to 489.16, 675.06 and 279.37

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Solution

The fourth proportional to 489.16, 675.06 and 279.37 is: 385.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.16 : 675.06 = 279.37 : x
  2. Step 2: Convert to fraction form
    489.16/675.06 = 279.37/x
  3. Step 3: Cross multiply
    489.16x = 675.06 × 279.37
  4. Step 4: Simplify right side
    489.16x = 188,586.74
  5. Step 5: Solve for x
    x = 188,586.74/489.16
  6. Step 6: Final answer
    x = 385.54

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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.