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Finding the Fourth Proportional to 492,939.03, 739,408.68 and 138,005.34

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Solution

The fourth proportional to 492,939.03, 739,408.68 and 138,005.34 is: 207,008.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,939.03 : 739,408.68 = 138,005.34 : x
  2. Step 2: Convert to fraction form
    492,939.03/739,408.68 = 138,005.34/x
  3. Step 3: Cross multiply
    492,939.03x = 739,408.68 × 138,005.34
  4. Step 4: Simplify right side
    492,939.03x = 102,042,346,282.35
  5. Step 5: Solve for x
    x = 102,042,346,282.35/492,939.03
  6. Step 6: Final answer
    x = 207,008.05

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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.