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Finding the Fourth Proportional to 489.81, 734.25 and 181.58

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Solution

The fourth proportional to 489.81, 734.25 and 181.58 is: 272.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.81 : 734.25 = 181.58 : x
  2. Step 2: Convert to fraction form
    489.81/734.25 = 181.58/x
  3. Step 3: Cross multiply
    489.81x = 734.25 × 181.58
  4. Step 4: Simplify right side
    489.81x = 133,326.95
  5. Step 5: Solve for x
    x = 133,326.95/489.81
  6. Step 6: Final answer
    x = 272.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.