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Finding the Fourth Proportional to 422,425.60, 633,638.40 and 262,628.80

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Solution

The fourth proportional to 422,425.60, 633,638.40 and 262,628.80 is: 393,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,425.60 : 633,638.40 = 262,628.80 : x
  2. Step 2: Convert to fraction form
    422,425.60/633,638.40 = 262,628.80/x
  3. Step 3: Cross multiply
    422,425.60x = 633,638.40 × 262,628.80
  4. Step 4: Simplify right side
    422,425.60x = 166,411,692,625.92
  5. Step 5: Solve for x
    x = 166,411,692,625.92/422,425.60
  6. Step 6: Final answer
    x = 393,943.20

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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.