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Finding the Fourth Proportional to 609.22, 913.56 and 580.60

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Solution

The fourth proportional to 609.22, 913.56 and 580.60 is: 870.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.22 : 913.56 = 580.60 : x
  2. Step 2: Convert to fraction form
    609.22/913.56 = 580.60/x
  3. Step 3: Cross multiply
    609.22x = 913.56 × 580.60
  4. Step 4: Simplify right side
    609.22x = 530,412.94
  5. Step 5: Solve for x
    x = 530,412.94/609.22
  6. Step 6: Final answer
    x = 870.64

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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.