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Finding the Fourth Proportional to 429,066.80, 643,600.20 and 329,728.40

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Solution

The fourth proportional to 429,066.80, 643,600.20 and 329,728.40 is: 494,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,066.80 : 643,600.20 = 329,728.40 : x
  2. Step 2: Convert to fraction form
    429,066.80/643,600.20 = 329,728.40/x
  3. Step 3: Cross multiply
    429,066.80x = 643,600.20 × 329,728.40
  4. Step 4: Simplify right side
    429,066.80x = 212,213,264,185.68
  5. Step 5: Solve for x
    x = 212,213,264,185.68/429,066.80
  6. Step 6: Final answer
    x = 494,592.60

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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.