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Finding the Fourth Proportional to 426,562.20, 640,064.10 and 174,027.80

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Solution

The fourth proportional to 426,562.20, 640,064.10 and 174,027.80 is: 261,131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,562.20 : 640,064.10 = 174,027.80 : x
  2. Step 2: Convert to fraction form
    426,562.20/640,064.10 = 174,027.80/x
  3. Step 3: Cross multiply
    426,562.20x = 640,064.10 × 174,027.80
  4. Step 4: Simplify right side
    426,562.20x = 111,388,947,181.98
  5. Step 5: Solve for x
    x = 111,388,947,181.98/426,562.20
  6. Step 6: Final answer
    x = 261,131.78

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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.