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Finding the Fourth Proportional to 609.36, 840.60 and 376.08

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Solution

The fourth proportional to 609.36, 840.60 and 376.08 is: 518.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.36 : 840.60 = 376.08 : x
  2. Step 2: Convert to fraction form
    609.36/840.60 = 376.08/x
  3. Step 3: Cross multiply
    609.36x = 840.60 × 376.08
  4. Step 4: Simplify right side
    609.36x = 316,132.85
  5. Step 5: Solve for x
    x = 316,132.85/609.36
  6. Step 6: Final answer
    x = 518.79

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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.