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Finding the Fourth Proportional to 406.60, 561.54 and 329.32

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Solution

The fourth proportional to 406.60, 561.54 and 329.32 is: 454.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.60 : 561.54 = 329.32 : x
  2. Step 2: Convert to fraction form
    406.60/561.54 = 329.32/x
  3. Step 3: Cross multiply
    406.60x = 561.54 × 329.32
  4. Step 4: Simplify right side
    406.60x = 184,926.35
  5. Step 5: Solve for x
    x = 184,926.35/406.60
  6. Step 6: Final answer
    x = 454.81

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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.