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Finding the Fourth Proportional to 609.21, 913.80 and 192.77

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Solution

The fourth proportional to 609.21, 913.80 and 192.77 is: 289.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.21 : 913.80 = 192.77 : x
  2. Step 2: Convert to fraction form
    609.21/913.80 = 192.77/x
  3. Step 3: Cross multiply
    609.21x = 913.80 × 192.77
  4. Step 4: Simplify right side
    609.21x = 176,153.23
  5. Step 5: Solve for x
    x = 176,153.23/609.21
  6. Step 6: Final answer
    x = 289.15

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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.