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Finding the Fourth Proportional to 439,880.20, 659,820.30 and 327,905.80

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Solution

The fourth proportional to 439,880.20, 659,820.30 and 327,905.80 is: 491,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,880.20 : 659,820.30 = 327,905.80 : x
  2. Step 2: Convert to fraction form
    439,880.20/659,820.30 = 327,905.80/x
  3. Step 3: Cross multiply
    439,880.20x = 659,820.30 × 327,905.80
  4. Step 4: Simplify right side
    439,880.20x = 216,358,903,327.74
  5. Step 5: Solve for x
    x = 216,358,903,327.74/439,880.20
  6. Step 6: Final answer
    x = 491,858.70

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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.