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Finding the Fourth Proportional to 354,321.20, 531,481.80 and 338,963.60

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Solution

The fourth proportional to 354,321.20, 531,481.80 and 338,963.60 is: 508,445.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,321.20 : 531,481.80 = 338,963.60 : x
  2. Step 2: Convert to fraction form
    354,321.20/531,481.80 = 338,963.60/x
  3. Step 3: Cross multiply
    354,321.20x = 531,481.80 × 338,963.60
  4. Step 4: Simplify right side
    354,321.20x = 180,152,984,262.48
  5. Step 5: Solve for x
    x = 180,152,984,262.48/354,321.20
  6. Step 6: Final answer
    x = 508,445.40

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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.