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Finding the Fourth Proportional to 429,274.80, 643,704.84 and 251,839.44

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Solution

The fourth proportional to 429,274.80, 643,704.84 and 251,839.44 is: 377,637.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,274.80 : 643,704.84 = 251,839.44 : x
  2. Step 2: Convert to fraction form
    429,274.80/643,704.84 = 251,839.44/x
  3. Step 3: Cross multiply
    429,274.80x = 643,704.84 × 251,839.44
  4. Step 4: Simplify right side
    429,274.80x = 162,110,266,430.89
  5. Step 5: Solve for x
    x = 162,110,266,430.89/429,274.80
  6. Step 6: Final answer
    x = 377,637.51

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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.