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Finding the Fourth Proportional to 617.20, 927.60 and 606.40

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Solution

The fourth proportional to 617.20, 927.60 and 606.40 is: 911.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.20 : 927.60 = 606.40 : x
  2. Step 2: Convert to fraction form
    617.20/927.60 = 606.40/x
  3. Step 3: Cross multiply
    617.20x = 927.60 × 606.40
  4. Step 4: Simplify right side
    617.20x = 562,496.64
  5. Step 5: Solve for x
    x = 562,496.64/617.20
  6. Step 6: Final answer
    x = 911.37

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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.