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Finding the Fourth Proportional to 693.05, 1,038.77 and 327.34

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Solution

The fourth proportional to 693.05, 1,038.77 and 327.34 is: 490.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.05 : 1,038.77 = 327.34 : x
  2. Step 2: Convert to fraction form
    693.05/1,038.77 = 327.34/x
  3. Step 3: Cross multiply
    693.05x = 1,038.77 × 327.34
  4. Step 4: Simplify right side
    693.05x = 340,024.14
  5. Step 5: Solve for x
    x = 340,024.14/693.05
  6. Step 6: Final answer
    x = 490.62

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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.