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Finding the Fourth Proportional to 418,545.20, 628,163.40 and 194,250.80

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Solution

The fourth proportional to 418,545.20, 628,163.40 and 194,250.80 is: 291,536.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,545.20 : 628,163.40 = 194,250.80 : x
  2. Step 2: Convert to fraction form
    418,545.20/628,163.40 = 194,250.80/x
  3. Step 3: Cross multiply
    418,545.20x = 628,163.40 × 194,250.80
  4. Step 4: Simplify right side
    418,545.20x = 122,021,242,980.72
  5. Step 5: Solve for x
    x = 122,021,242,980.72/418,545.20
  6. Step 6: Final answer
    x = 291,536.60

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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.