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Finding the Fourth Proportional to 609.21, 841.19 and 499.05

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Solution

The fourth proportional to 609.21, 841.19 and 499.05 is: 689.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.21 : 841.19 = 499.05 : x
  2. Step 2: Convert to fraction form
    609.21/841.19 = 499.05/x
  3. Step 3: Cross multiply
    609.21x = 841.19 × 499.05
  4. Step 4: Simplify right side
    609.21x = 419,793.37
  5. Step 5: Solve for x
    x = 419,793.37/609.21
  6. Step 6: Final answer
    x = 689.08

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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.