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Finding the Fourth Proportional to 609.64, 840.90 and 376.36

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Solution

The fourth proportional to 609.64, 840.90 and 376.36 is: 519.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.64 : 840.90 = 376.36 : x
  2. Step 2: Convert to fraction form
    609.64/840.90 = 376.36/x
  3. Step 3: Cross multiply
    609.64x = 840.90 × 376.36
  4. Step 4: Simplify right side
    609.64x = 316,481.12
  5. Step 5: Solve for x
    x = 316,481.12/609.64
  6. Step 6: Final answer
    x = 519.13

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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.