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Finding the Fourth Proportional to 664,415.80, 995,435.70 and 404,279.80

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Solution

The fourth proportional to 664,415.80, 995,435.70 and 404,279.80 is: 605,696.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,415.80 : 995,435.70 = 404,279.80 : x
  2. Step 2: Convert to fraction form
    664,415.80/995,435.70 = 404,279.80/x
  3. Step 3: Cross multiply
    664,415.80x = 995,435.70 × 404,279.80
  4. Step 4: Simplify right side
    664,415.80x = 402,434,545,708.86
  5. Step 5: Solve for x
    x = 402,434,545,708.86/664,415.80
  6. Step 6: Final answer
    x = 605,696.83

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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.