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Finding the Fourth Proportional to 399,629.80, 599,444.70 and 320,897.80

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Solution

The fourth proportional to 399,629.80, 599,444.70 and 320,897.80 is: 481,346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,629.80 : 599,444.70 = 320,897.80 : x
  2. Step 2: Convert to fraction form
    399,629.80/599,444.70 = 320,897.80/x
  3. Step 3: Cross multiply
    399,629.80x = 599,444.70 × 320,897.80
  4. Step 4: Simplify right side
    399,629.80x = 192,360,485,451.66
  5. Step 5: Solve for x
    x = 192,360,485,451.66/399,629.80
  6. Step 6: Final answer
    x = 481,346.70

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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.