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Finding the Fourth Proportional to 403,375.70, 605,063.55 and 338,421.80

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Solution

The fourth proportional to 403,375.70, 605,063.55 and 338,421.80 is: 507,632.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,375.70 : 605,063.55 = 338,421.80 : x
  2. Step 2: Convert to fraction form
    403,375.70/605,063.55 = 338,421.80/x
  3. Step 3: Cross multiply
    403,375.70x = 605,063.55 × 338,421.80
  4. Step 4: Simplify right side
    403,375.70x = 204,766,695,705.39
  5. Step 5: Solve for x
    x = 204,766,695,705.39/403,375.70
  6. Step 6: Final answer
    x = 507,632.70

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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.