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Finding the Fourth Proportional to 403,811.40, 605,717.10 and 245,958.60

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Solution

The fourth proportional to 403,811.40, 605,717.10 and 245,958.60 is: 368,937.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,811.40 : 605,717.10 = 245,958.60 : x
  2. Step 2: Convert to fraction form
    403,811.40/605,717.10 = 245,958.60/x
  3. Step 3: Cross multiply
    403,811.40x = 605,717.10 × 245,958.60
  4. Step 4: Simplify right side
    403,811.40x = 148,981,329,912.06
  5. Step 5: Solve for x
    x = 148,981,329,912.06/403,811.40
  6. Step 6: Final answer
    x = 368,937.90

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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.