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Finding the Fourth Proportional to 323,810.40, 485,715.60 and 289,984.80

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Solution

The fourth proportional to 323,810.40, 485,715.60 and 289,984.80 is: 434,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,810.40 : 485,715.60 = 289,984.80 : x
  2. Step 2: Convert to fraction form
    323,810.40/485,715.60 = 289,984.80/x
  3. Step 3: Cross multiply
    323,810.40x = 485,715.60 × 289,984.80
  4. Step 4: Simplify right side
    323,810.40x = 140,850,141,122.88
  5. Step 5: Solve for x
    x = 140,850,141,122.88/323,810.40
  6. Step 6: Final answer
    x = 434,977.20

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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.