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Finding the Fourth Proportional to 664,487.80, 995,543.70 and 404,351.80

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Solution

The fourth proportional to 664,487.80, 995,543.70 and 404,351.80 is: 605,804.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,487.80 : 995,543.70 = 404,351.80 : x
  2. Step 2: Convert to fraction form
    664,487.80/995,543.70 = 404,351.80/x
  3. Step 3: Cross multiply
    664,487.80x = 995,543.70 × 404,351.80
  4. Step 4: Simplify right side
    664,487.80x = 402,549,887,073.66
  5. Step 5: Solve for x
    x = 402,549,887,073.66/664,487.80
  6. Step 6: Final answer
    x = 605,804.78

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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.