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Finding the Fourth Proportional to 439,920.20, 659,880.30 and 327,945.80

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Solution

The fourth proportional to 439,920.20, 659,880.30 and 327,945.80 is: 491,918.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,920.20 : 659,880.30 = 327,945.80 : x
  2. Step 2: Convert to fraction form
    439,920.20/659,880.30 = 327,945.80/x
  3. Step 3: Cross multiply
    439,920.20x = 659,880.30 × 327,945.80
  4. Step 4: Simplify right side
    439,920.20x = 216,404,972,887.74
  5. Step 5: Solve for x
    x = 216,404,972,887.74/439,920.20
  6. Step 6: Final answer
    x = 491,918.70

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Double scale
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Similar ratio
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1.5x scale

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.