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Finding the Fourth Proportional to 664,515.80, 995,585.70 and 404,379.80

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Solution

The fourth proportional to 664,515.80, 995,585.70 and 404,379.80 is: 605,846.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,515.80 : 995,585.70 = 404,379.80 : x
  2. Step 2: Convert to fraction form
    664,515.80/995,585.70 = 404,379.80/x
  3. Step 3: Cross multiply
    664,515.80x = 995,585.70 × 404,379.80
  4. Step 4: Simplify right side
    664,515.80x = 402,594,746,248.86
  5. Step 5: Solve for x
    x = 402,594,746,248.86/664,515.80
  6. Step 6: Final answer
    x = 605,846.76

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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.