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Finding the Fourth Proportional to 435.86, 654.09 and 320.60

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Solution

The fourth proportional to 435.86, 654.09 and 320.60 is: 481.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.86 : 654.09 = 320.60 : x
  2. Step 2: Convert to fraction form
    435.86/654.09 = 320.60/x
  3. Step 3: Cross multiply
    435.86x = 654.09 × 320.60
  4. Step 4: Simplify right side
    435.86x = 209,701.25
  5. Step 5: Solve for x
    x = 209,701.25/435.86
  6. Step 6: Final answer
    x = 481.12

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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.