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Finding the Fourth Proportional to 667,925.80, 999,920.40 and 443,539.60

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Solution

The fourth proportional to 667,925.80, 999,920.40 and 443,539.60 is: 664,002.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,925.80 : 999,920.40 = 443,539.60 : x
  2. Step 2: Convert to fraction form
    667,925.80/999,920.40 = 443,539.60/x
  3. Step 3: Cross multiply
    667,925.80x = 999,920.40 × 443,539.60
  4. Step 4: Simplify right side
    667,925.80x = 443,504,294,247.84
  5. Step 5: Solve for x
    x = 443,504,294,247.84/667,925.80
  6. Step 6: Final answer
    x = 664,002.34

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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.