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Finding the Fourth Proportional to 693.65, 957.32 and 394.97

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Solution

The fourth proportional to 693.65, 957.32 and 394.97 is: 545.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.65 : 957.32 = 394.97 : x
  2. Step 2: Convert to fraction form
    693.65/957.32 = 394.97/x
  3. Step 3: Cross multiply
    693.65x = 957.32 × 394.97
  4. Step 4: Simplify right side
    693.65x = 378,112.68
  5. Step 5: Solve for x
    x = 378,112.68/693.65
  6. Step 6: Final answer
    x = 545.11

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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.