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Finding the Fourth Proportional to 429,997.56, 644,997.76 and 130,480.62

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Solution

The fourth proportional to 429,997.56, 644,997.76 and 130,480.62 is: 195,721.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,997.56 : 644,997.76 = 130,480.62 : x
  2. Step 2: Convert to fraction form
    429,997.56/644,997.76 = 130,480.62/x
  3. Step 3: Cross multiply
    429,997.56x = 644,997.76 × 130,480.62
  4. Step 4: Simplify right side
    429,997.56x = 84,159,707,623.41
  5. Step 5: Solve for x
    x = 84,159,707,623.41/429,997.56
  6. Step 6: Final answer
    x = 195,721.36

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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.