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Finding the Fourth Proportional to 345,249.88, 517,830.90 and 145,649.56

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Solution

The fourth proportional to 345,249.88, 517,830.90 and 145,649.56 is: 218,455.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,249.88 : 517,830.90 = 145,649.56 : x
  2. Step 2: Convert to fraction form
    345,249.88/517,830.90 = 145,649.56/x
  3. Step 3: Cross multiply
    345,249.88x = 517,830.90 × 145,649.56
  4. Step 4: Simplify right side
    345,249.88x = 75,421,842,739.40
  5. Step 5: Solve for x
    x = 75,421,842,739.40/345,249.88
  6. Step 6: Final answer
    x = 218,455.81

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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.