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Finding the Fourth Proportional to 323,877.60, 485,816.40 and 289,760.40

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Solution

The fourth proportional to 323,877.60, 485,816.40 and 289,760.40 is: 434,640.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,877.60 : 485,816.40 = 289,760.40 : x
  2. Step 2: Convert to fraction form
    323,877.60/485,816.40 = 289,760.40/x
  3. Step 3: Cross multiply
    323,877.60x = 485,816.40 × 289,760.40
  4. Step 4: Simplify right side
    323,877.60x = 140,770,354,390.56
  5. Step 5: Solve for x
    x = 140,770,354,390.56/323,877.60
  6. Step 6: Final answer
    x = 434,640.60

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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.