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Finding the Fourth Proportional to 489.95, 734.85 and 181.76

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Solution

The fourth proportional to 489.95, 734.85 and 181.76 is: 272.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.95 : 734.85 = 181.76 : x
  2. Step 2: Convert to fraction form
    489.95/734.85 = 181.76/x
  3. Step 3: Cross multiply
    489.95x = 734.85 × 181.76
  4. Step 4: Simplify right side
    489.95x = 133,566.34
  5. Step 5: Solve for x
    x = 133,566.34/489.95
  6. Step 6: Final answer
    x = 272.61

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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.