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Finding the Fourth Proportional to 429,937.20, 644,912.10 and 163,712.43

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Solution

The fourth proportional to 429,937.20, 644,912.10 and 163,712.43 is: 245,571.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,937.20 : 644,912.10 = 163,712.43 : x
  2. Step 2: Convert to fraction form
    429,937.20/644,912.10 = 163,712.43/x
  3. Step 3: Cross multiply
    429,937.20x = 644,912.10 × 163,712.43
  4. Step 4: Simplify right side
    429,937.20x = 105,580,127,027.40
  5. Step 5: Solve for x
    x = 105,580,127,027.40/429,937.20
  6. Step 6: Final answer
    x = 245,571.04

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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.