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Finding the Fourth Proportional to 323,415.20, 485,122.80 and 289,200.80

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Solution

The fourth proportional to 323,415.20, 485,122.80 and 289,200.80 is: 433,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,415.20 : 485,122.80 = 289,200.80 : x
  2. Step 2: Convert to fraction form
    323,415.20/485,122.80 = 289,200.80/x
  3. Step 3: Cross multiply
    323,415.20x = 485,122.80 × 289,200.80
  4. Step 4: Simplify right side
    323,415.20x = 140,297,901,858.24
  5. Step 5: Solve for x
    x = 140,297,901,858.24/323,415.20
  6. Step 6: Final answer
    x = 433,801.20

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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.