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Finding the Fourth Proportional to 258,992.40, 389,363.40 and 220,501.20

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Solution

The fourth proportional to 258,992.40, 389,363.40 and 220,501.20 is: 331,496.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,992.40 : 389,363.40 = 220,501.20 : x
  2. Step 2: Convert to fraction form
    258,992.40/389,363.40 = 220,501.20/x
  3. Step 3: Cross multiply
    258,992.40x = 389,363.40 × 220,501.20
  4. Step 4: Simplify right side
    258,992.40x = 85,855,096,936.08
  5. Step 5: Solve for x
    x = 85,855,096,936.08/258,992.40
  6. Step 6: Final answer
    x = 331,496.59

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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.