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Finding the Fourth Proportional to 419,265.32, 628,890.54 and 103,722.20

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Solution

The fourth proportional to 419,265.32, 628,890.54 and 103,722.20 is: 155,581.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,265.32 : 628,890.54 = 103,722.20 : x
  2. Step 2: Convert to fraction form
    419,265.32/628,890.54 = 103,722.20/x
  3. Step 3: Cross multiply
    419,265.32x = 628,890.54 × 103,722.20
  4. Step 4: Simplify right side
    419,265.32x = 65,229,910,367.99
  5. Step 5: Solve for x
    x = 65,229,910,367.99/419,265.32
  6. Step 6: Final answer
    x = 155,581.46

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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.