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Finding the Fourth Proportional to 429,392.79, 644,197.86 and 303,279.30

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Solution

The fourth proportional to 429,392.79, 644,197.86 and 303,279.30 is: 454,995.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,392.79 : 644,197.86 = 303,279.30 : x
  2. Step 2: Convert to fraction form
    429,392.79/644,197.86 = 303,279.30/x
  3. Step 3: Cross multiply
    429,392.79x = 644,197.86 × 303,279.30
  4. Step 4: Simplify right side
    429,392.79x = 195,371,876,042.30
  5. Step 5: Solve for x
    x = 195,371,876,042.30/429,392.79
  6. Step 6: Final answer
    x = 454,995.71

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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.