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Finding the Fourth Proportional to 609.20, 841.44 and 388.34

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Solution

The fourth proportional to 609.20, 841.44 and 388.34 is: 536.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.20 : 841.44 = 388.34 : x
  2. Step 2: Convert to fraction form
    609.20/841.44 = 388.34/x
  3. Step 3: Cross multiply
    609.20x = 841.44 × 388.34
  4. Step 4: Simplify right side
    609.20x = 326,764.81
  5. Step 5: Solve for x
    x = 326,764.81/609.20
  6. Step 6: Final answer
    x = 536.38

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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.