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Finding the Fourth Proportional to 496,389.40, 744,891.90 and 259,901.80

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Solution

The fourth proportional to 496,389.40, 744,891.90 and 259,901.80 is: 390,013.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,389.40 : 744,891.90 = 259,901.80 : x
  2. Step 2: Convert to fraction form
    496,389.40/744,891.90 = 259,901.80/x
  3. Step 3: Cross multiply
    496,389.40x = 744,891.90 × 259,901.80
  4. Step 4: Simplify right side
    496,389.40x = 193,598,745,615.42
  5. Step 5: Solve for x
    x = 193,598,745,615.42/496,389.40
  6. Step 6: Final answer
    x = 390,013.86

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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.