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Finding the Fourth Proportional to 485,589.89, 728,459.82 and 165,666.80

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Solution

The fourth proportional to 485,589.89, 728,459.82 and 165,666.80 is: 248,525.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,589.89 : 728,459.82 = 165,666.80 : x
  2. Step 2: Convert to fraction form
    485,589.89/728,459.82 = 165,666.80/x
  3. Step 3: Cross multiply
    485,589.89x = 728,459.82 × 165,666.80
  4. Step 4: Simplify right side
    485,589.89x = 120,681,603,665.68
  5. Step 5: Solve for x
    x = 120,681,603,665.68/485,589.89
  6. Step 6: Final answer
    x = 248,525.78

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1.5x scale

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.