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Finding the Fourth Proportional to 489,139.56, 731,869.74 and 289,553.88

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Solution

The fourth proportional to 489,139.56, 731,869.74 and 289,553.88 is: 433,241.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,139.56 : 731,869.74 = 289,553.88 : x
  2. Step 2: Convert to fraction form
    489,139.56/731,869.74 = 289,553.88/x
  3. Step 3: Cross multiply
    489,139.56x = 731,869.74 × 289,553.88
  4. Step 4: Simplify right side
    489,139.56x = 211,915,722,871.59
  5. Step 5: Solve for x
    x = 211,915,722,871.59/489,139.56
  6. Step 6: Final answer
    x = 433,241.84

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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.