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Finding the Fourth Proportional to 609.10, 912.03 and 487.60

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Solution

The fourth proportional to 609.10, 912.03 and 487.60 is: 730.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.10 : 912.03 = 487.60 : x
  2. Step 2: Convert to fraction form
    609.10/912.03 = 487.60/x
  3. Step 3: Cross multiply
    609.10x = 912.03 × 487.60
  4. Step 4: Simplify right side
    609.10x = 444,701.72
  5. Step 5: Solve for x
    x = 444,701.72/609.10
  6. Step 6: Final answer
    x = 730.10

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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.