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Finding the Fourth Proportional to 685.04, 1,027.32 and 338.36

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Solution

The fourth proportional to 685.04, 1,027.32 and 338.36 is: 507.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.04 : 1,027.32 = 338.36 : x
  2. Step 2: Convert to fraction form
    685.04/1,027.32 = 338.36/x
  3. Step 3: Cross multiply
    685.04x = 1,027.32 × 338.36
  4. Step 4: Simplify right side
    685.04x = 347,604.00
  5. Step 5: Solve for x
    x = 347,604.00/685.04
  6. Step 6: Final answer
    x = 507.42

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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.