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Finding the Fourth Proportional to 429,010.80, 643,516.20 and 329,672.40

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Solution

The fourth proportional to 429,010.80, 643,516.20 and 329,672.40 is: 494,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,010.80 : 643,516.20 = 329,672.40 : x
  2. Step 2: Convert to fraction form
    429,010.80/643,516.20 = 329,672.40/x
  3. Step 3: Cross multiply
    429,010.80x = 643,516.20 × 329,672.40
  4. Step 4: Simplify right side
    429,010.80x = 212,149,530,092.88
  5. Step 5: Solve for x
    x = 212,149,530,092.88/429,010.80
  6. Step 6: Final answer
    x = 494,508.60

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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.