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Finding the Fourth Proportional to 489.75, 734.60 and 181.47

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Solution

The fourth proportional to 489.75, 734.60 and 181.47 is: 272.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.75 : 734.60 = 181.47 : x
  2. Step 2: Convert to fraction form
    489.75/734.60 = 181.47/x
  3. Step 3: Cross multiply
    489.75x = 734.60 × 181.47
  4. Step 4: Simplify right side
    489.75x = 133,303.28
  5. Step 5: Solve for x
    x = 133,303.28/489.75
  6. Step 6: Final answer
    x = 272.19

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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.