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Finding the Fourth Proportional to 391,528.80, 587,293.20 and 325,101.60

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Solution

The fourth proportional to 391,528.80, 587,293.20 and 325,101.60 is: 487,652.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,528.80 : 587,293.20 = 325,101.60 : x
  2. Step 2: Convert to fraction form
    391,528.80/587,293.20 = 325,101.60/x
  3. Step 3: Cross multiply
    391,528.80x = 587,293.20 × 325,101.60
  4. Step 4: Simplify right side
    391,528.80x = 190,929,958,989.12
  5. Step 5: Solve for x
    x = 190,929,958,989.12/391,528.80
  6. Step 6: Final answer
    x = 487,652.40

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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.