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Finding the Fourth Proportional to 438,991.89, 658,035.86 and 172,644.45

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Solution

The fourth proportional to 438,991.89, 658,035.86 and 172,644.45 is: 258,788.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,991.89 : 658,035.86 = 172,644.45 : x
  2. Step 2: Convert to fraction form
    438,991.89/658,035.86 = 172,644.45/x
  3. Step 3: Cross multiply
    438,991.89x = 658,035.86 × 172,644.45
  4. Step 4: Simplify right side
    438,991.89x = 113,606,238,266.76
  5. Step 5: Solve for x
    x = 113,606,238,266.76/438,991.89
  6. Step 6: Final answer
    x = 258,788.92

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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.