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Finding the Fourth Proportional to 640,216.60, 959,061.30 and 324,899.80

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Solution

The fourth proportional to 640,216.60, 959,061.30 and 324,899.80 is: 486,708.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,216.60 : 959,061.30 = 324,899.80 : x
  2. Step 2: Convert to fraction form
    640,216.60/959,061.30 = 324,899.80/x
  3. Step 3: Cross multiply
    640,216.60x = 959,061.30 × 324,899.80
  4. Step 4: Simplify right side
    640,216.60x = 311,598,824,557.74
  5. Step 5: Solve for x
    x = 311,598,824,557.74/640,216.60
  6. Step 6: Final answer
    x = 486,708.44

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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.