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Finding the Fourth Proportional to 323,814.80, 485,722.20 and 311,373.20

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Solution

The fourth proportional to 323,814.80, 485,722.20 and 311,373.20 is: 467,059.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,814.80 : 485,722.20 = 311,373.20 : x
  2. Step 2: Convert to fraction form
    323,814.80/485,722.20 = 311,373.20/x
  3. Step 3: Cross multiply
    323,814.80x = 485,722.20 × 311,373.20
  4. Step 4: Simplify right side
    323,814.80x = 151,240,875,725.04
  5. Step 5: Solve for x
    x = 151,240,875,725.04/323,814.80
  6. Step 6: Final answer
    x = 467,059.80

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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.