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Finding the Fourth Proportional to 439,282.20, 657,611.10 and 261,697.80

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Solution

The fourth proportional to 439,282.20, 657,611.10 and 261,697.80 is: 391,764.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,282.20 : 657,611.10 = 261,697.80 : x
  2. Step 2: Convert to fraction form
    439,282.20/657,611.10 = 261,697.80/x
  3. Step 3: Cross multiply
    439,282.20x = 657,611.10 × 261,697.80
  4. Step 4: Simplify right side
    439,282.20x = 172,095,378,125.58
  5. Step 5: Solve for x
    x = 172,095,378,125.58/439,282.20
  6. Step 6: Final answer
    x = 391,764.97

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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.