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Finding the Fourth Proportional to 323,625.60, 485,438.40 and 211,651.20

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Solution

The fourth proportional to 323,625.60, 485,438.40 and 211,651.20 is: 317,476.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,625.60 : 485,438.40 = 211,651.20 : x
  2. Step 2: Convert to fraction form
    323,625.60/485,438.40 = 211,651.20/x
  3. Step 3: Cross multiply
    323,625.60x = 485,438.40 × 211,651.20
  4. Step 4: Simplify right side
    323,625.60x = 102,743,619,886.08
  5. Step 5: Solve for x
    x = 102,743,619,886.08/323,625.60
  6. Step 6: Final answer
    x = 317,476.80

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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.