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Finding the Fourth Proportional to 426,744.98, 640,519.26 and 216,533.78

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Solution

The fourth proportional to 426,744.98, 640,519.26 and 216,533.78 is: 325,004.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,744.98 : 640,519.26 = 216,533.78 : x
  2. Step 2: Convert to fraction form
    426,744.98/640,519.26 = 216,533.78/x
  3. Step 3: Cross multiply
    426,744.98x = 640,519.26 × 216,533.78
  4. Step 4: Simplify right side
    426,744.98x = 138,694,056,530.60
  5. Step 5: Solve for x
    x = 138,694,056,530.60/426,744.98
  6. Step 6: Final answer
    x = 325,004.54

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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.