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Finding the Fourth Proportional to 645.89, 969.01 and 183.68

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Solution

The fourth proportional to 645.89, 969.01 and 183.68 is: 275.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.89 : 969.01 = 183.68 : x
  2. Step 2: Convert to fraction form
    645.89/969.01 = 183.68/x
  3. Step 3: Cross multiply
    645.89x = 969.01 × 183.68
  4. Step 4: Simplify right side
    645.89x = 177,987.76
  5. Step 5: Solve for x
    x = 177,987.76/645.89
  6. Step 6: Final answer
    x = 275.57

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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.