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Finding the Fourth Proportional to 379,810.72, 569,540.43 and 139,864.03

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Solution

The fourth proportional to 379,810.72, 569,540.43 and 139,864.03 is: 209,731.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,810.72 : 569,540.43 = 139,864.03 : x
  2. Step 2: Convert to fraction form
    379,810.72/569,540.43 = 139,864.03/x
  3. Step 3: Cross multiply
    379,810.72x = 569,540.43 × 139,864.03
  4. Step 4: Simplify right side
    379,810.72x = 79,658,219,787.73
  5. Step 5: Solve for x
    x = 79,658,219,787.73/379,810.72
  6. Step 6: Final answer
    x = 209,731.36

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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.