Home / 429,042.80-643,564.20-329,704.40

Finding the Fourth Proportional to 429,042.80, 643,564.20 and 329,704.40

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Solution

The fourth proportional to 429,042.80, 643,564.20 and 329,704.40 is: 494,556.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,042.80 : 643,564.20 = 329,704.40 : x
  2. Step 2: Convert to fraction form
    429,042.80/643,564.20 = 329,704.40/x
  3. Step 3: Cross multiply
    429,042.80x = 643,564.20 × 329,704.40
  4. Step 4: Simplify right side
    429,042.80x = 212,185,948,422.48
  5. Step 5: Solve for x
    x = 212,185,948,422.48/429,042.80
  6. Step 6: Final answer
    x = 494,556.60

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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.