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Finding the Fourth Proportional to 403,879.96, 605,929.02 and 123,389.56

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Solution

The fourth proportional to 403,879.96, 605,929.02 and 123,389.56 is: 185,117.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,879.96 : 605,929.02 = 123,389.56 : x
  2. Step 2: Convert to fraction form
    403,879.96/605,929.02 = 123,389.56/x
  3. Step 3: Cross multiply
    403,879.96x = 605,929.02 × 123,389.56
  4. Step 4: Simplify right side
    403,879.96x = 74,765,315,169.03
  5. Step 5: Solve for x
    x = 74,765,315,169.03/403,879.96
  6. Step 6: Final answer
    x = 185,117.67

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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.