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Finding the Fourth Proportional to 419,989.64, 629,987 and 104,446.58

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Solution

The fourth proportional to 419,989.64, 629,987 and 104,446.58 is: 156,670.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,989.64 : 629,987 = 104,446.58 : x
  2. Step 2: Convert to fraction form
    419,989.64/629,987 = 104,446.58/x
  3. Step 3: Cross multiply
    419,989.64x = 629,987 × 104,446.58
  4. Step 4: Simplify right side
    419,989.64x = 65,799,987,594.46
  5. Step 5: Solve for x
    x = 65,799,987,594.46/419,989.64
  6. Step 6: Final answer
    x = 156,670.50

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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.