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Finding the Fourth Proportional to 323,999.60, 485,999.40 and 289,882.40

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Solution

The fourth proportional to 323,999.60, 485,999.40 and 289,882.40 is: 434,823.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,999.60 : 485,999.40 = 289,882.40 : x
  2. Step 2: Convert to fraction form
    323,999.60/485,999.40 = 289,882.40/x
  3. Step 3: Cross multiply
    323,999.60x = 485,999.40 × 289,882.40
  4. Step 4: Simplify right side
    323,999.60x = 140,882,672,470.56
  5. Step 5: Solve for x
    x = 140,882,672,470.56/323,999.60
  6. Step 6: Final answer
    x = 434,823.60

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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.