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Finding the Fourth Proportional to 391,452.80, 587,179.20 and 325,025.60

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Solution

The fourth proportional to 391,452.80, 587,179.20 and 325,025.60 is: 487,538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,452.80 : 587,179.20 = 325,025.60 : x
  2. Step 2: Convert to fraction form
    391,452.80/587,179.20 = 325,025.60/x
  3. Step 3: Cross multiply
    391,452.80x = 587,179.20 × 325,025.60
  4. Step 4: Simplify right side
    391,452.80x = 190,848,271,787.52
  5. Step 5: Solve for x
    x = 190,848,271,787.52/391,452.80
  6. Step 6: Final answer
    x = 487,538.40

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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.