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Finding the Fourth Proportional to 435.66, 654.21 and 289.86

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Solution

The fourth proportional to 435.66, 654.21 and 289.86 is: 435.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.66 : 654.21 = 289.86 : x
  2. Step 2: Convert to fraction form
    435.66/654.21 = 289.86/x
  3. Step 3: Cross multiply
    435.66x = 654.21 × 289.86
  4. Step 4: Simplify right side
    435.66x = 189,629.31
  5. Step 5: Solve for x
    x = 189,629.31/435.66
  6. Step 6: Final answer
    x = 435.27

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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.