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Finding the Fourth Proportional to 323,713.80, 485,570.70 and 211,739.40

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Solution

The fourth proportional to 323,713.80, 485,570.70 and 211,739.40 is: 317,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,713.80 : 485,570.70 = 211,739.40 : x
  2. Step 2: Convert to fraction form
    323,713.80/485,570.70 = 211,739.40/x
  3. Step 3: Cross multiply
    323,713.80x = 485,570.70 × 211,739.40
  4. Step 4: Simplify right side
    323,713.80x = 102,814,448,675.58
  5. Step 5: Solve for x
    x = 102,814,448,675.58/323,713.80
  6. Step 6: Final answer
    x = 317,609.10

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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.