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Finding the Fourth Proportional to 645.76, 891.66 and 596.62

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Solution

The fourth proportional to 645.76, 891.66 and 596.62 is: 823.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.76 : 891.66 = 596.62 : x
  2. Step 2: Convert to fraction form
    645.76/891.66 = 596.62/x
  3. Step 3: Cross multiply
    645.76x = 891.66 × 596.62
  4. Step 4: Simplify right side
    645.76x = 531,982.19
  5. Step 5: Solve for x
    x = 531,982.19/645.76
  6. Step 6: Final answer
    x = 823.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.