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Finding the Fourth Proportional to 429,069.80, 643,604.70 and 329,731.40

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Solution

The fourth proportional to 429,069.80, 643,604.70 and 329,731.40 is: 494,597.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,069.80 : 643,604.70 = 329,731.40 : x
  2. Step 2: Convert to fraction form
    429,069.80/643,604.70 = 329,731.40/x
  3. Step 3: Cross multiply
    429,069.80x = 643,604.70 × 329,731.40
  4. Step 4: Simplify right side
    429,069.80x = 212,216,678,777.58
  5. Step 5: Solve for x
    x = 212,216,678,777.58/429,069.80
  6. Step 6: Final answer
    x = 494,597.10

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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.