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Finding the Fourth Proportional to 664,406.30, 995,421.45 and 404,270.30

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Solution

The fourth proportional to 664,406.30, 995,421.45 and 404,270.30 is: 605,682.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,406.30 : 995,421.45 = 404,270.30 : x
  2. Step 2: Convert to fraction form
    664,406.30/995,421.45 = 404,270.30/x
  3. Step 3: Cross multiply
    664,406.30x = 995,421.45 × 404,270.30
  4. Step 4: Simplify right side
    664,406.30x = 402,419,328,217.94
  5. Step 5: Solve for x
    x = 402,419,328,217.94/664,406.30
  6. Step 6: Final answer
    x = 605,682.59

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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.