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Finding the Fourth Proportional to 664,407.80, 995,423.70 and 404,271.80

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Solution

The fourth proportional to 664,407.80, 995,423.70 and 404,271.80 is: 605,684.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,407.80 : 995,423.70 = 404,271.80 : x
  2. Step 2: Convert to fraction form
    664,407.80/995,423.70 = 404,271.80/x
  3. Step 3: Cross multiply
    664,407.80x = 995,423.70 × 404,271.80
  4. Step 4: Simplify right side
    664,407.80x = 402,421,730,961.66
  5. Step 5: Solve for x
    x = 402,421,730,961.66/664,407.80
  6. Step 6: Final answer
    x = 605,684.84

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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.