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Finding the Fourth Proportional to 664,395.80, 995,405.70 and 404,259.80

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Solution

The fourth proportional to 664,395.80, 995,405.70 and 404,259.80 is: 605,666.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,395.80 : 995,405.70 = 404,259.80 : x
  2. Step 2: Convert to fraction form
    664,395.80/995,405.70 = 404,259.80/x
  3. Step 3: Cross multiply
    664,395.80x = 995,405.70 × 404,259.80
  4. Step 4: Simplify right side
    664,395.80x = 402,402,509,200.86
  5. Step 5: Solve for x
    x = 402,402,509,200.86/664,395.80
  6. Step 6: Final answer
    x = 605,666.85

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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.