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Finding the Fourth Proportional to 609.08, 838.40 and 531.32

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Solution

The fourth proportional to 609.08, 838.40 and 531.32 is: 731.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.08 : 838.40 = 531.32 : x
  2. Step 2: Convert to fraction form
    609.08/838.40 = 531.32/x
  3. Step 3: Cross multiply
    609.08x = 838.40 × 531.32
  4. Step 4: Simplify right side
    609.08x = 445,458.69
  5. Step 5: Solve for x
    x = 445,458.69/609.08
  6. Step 6: Final answer
    x = 731.36

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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.