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Finding the Fourth Proportional to 620,717.20, 930,989.40 and 200,035.60

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Solution

The fourth proportional to 620,717.20, 930,989.40 and 200,035.60 is: 300,025.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,717.20 : 930,989.40 = 200,035.60 : x
  2. Step 2: Convert to fraction form
    620,717.20/930,989.40 = 200,035.60/x
  3. Step 3: Cross multiply
    620,717.20x = 930,989.40 × 200,035.60
  4. Step 4: Simplify right side
    620,717.20x = 186,231,023,222.64
  5. Step 5: Solve for x
    x = 186,231,023,222.64/620,717.20
  6. Step 6: Final answer
    x = 300,025.56

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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.