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Finding the Fourth Proportional to 489.50, 734.08 and 181.64

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Solution

The fourth proportional to 489.50, 734.08 and 181.64 is: 272.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.50 : 734.08 = 181.64 : x
  2. Step 2: Convert to fraction form
    489.50/734.08 = 181.64/x
  3. Step 3: Cross multiply
    489.50x = 734.08 × 181.64
  4. Step 4: Simplify right side
    489.50x = 133,338.29
  5. Step 5: Solve for x
    x = 133,338.29/489.50
  6. Step 6: Final answer
    x = 272.40

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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.