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Finding the Fourth Proportional to 435.87, 654.56 and 254.40

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Solution

The fourth proportional to 435.87, 654.56 and 254.40 is: 382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.87 : 654.56 = 254.40 : x
  2. Step 2: Convert to fraction form
    435.87/654.56 = 254.40/x
  3. Step 3: Cross multiply
    435.87x = 654.56 × 254.40
  4. Step 4: Simplify right side
    435.87x = 166,518.79
  5. Step 5: Solve for x
    x = 166,518.79/435.87
  6. Step 6: Final answer
    x = 382.04

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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.