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Finding the Fourth Proportional to 323,455.20, 485,182.80 and 289,240.80

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Solution

The fourth proportional to 323,455.20, 485,182.80 and 289,240.80 is: 433,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,455.20 : 485,182.80 = 289,240.80 : x
  2. Step 2: Convert to fraction form
    323,455.20/485,182.80 = 289,240.80/x
  3. Step 3: Cross multiply
    323,455.20x = 485,182.80 × 289,240.80
  4. Step 4: Simplify right side
    323,455.20x = 140,334,661,218.24
  5. Step 5: Solve for x
    x = 140,334,661,218.24/323,455.20
  6. Step 6: Final answer
    x = 433,861.20

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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.