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Finding the Fourth Proportional to 579,816.60, 800,119.79 and 321,690.80

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Solution

The fourth proportional to 579,816.60, 800,119.79 and 321,690.80 is: 443,918.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,816.60 : 800,119.79 = 321,690.80 : x
  2. Step 2: Convert to fraction form
    579,816.60/800,119.79 = 321,690.80/x
  3. Step 3: Cross multiply
    579,816.60x = 800,119.79 × 321,690.80
  4. Step 4: Simplify right side
    579,816.60x = 257,391,175,340.93
  5. Step 5: Solve for x
    x = 257,391,175,340.93/579,816.60
  6. Step 6: Final answer
    x = 443,918.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.