Home / 419,912.64-629,739.77-120,312.95

Finding the Fourth Proportional to 419,912.64, 629,739.77 and 120,312.95

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Solution

The fourth proportional to 419,912.64, 629,739.77 and 120,312.95 is: 180,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,912.64 : 629,739.77 = 120,312.95 : x
  2. Step 2: Convert to fraction form
    419,912.64/629,739.77 = 120,312.95/x
  3. Step 3: Cross multiply
    419,912.64x = 629,739.77 × 120,312.95
  4. Step 4: Simplify right side
    419,912.64x = 75,765,845,710.76
  5. Step 5: Solve for x
    x = 75,765,845,710.76/419,912.64
  6. Step 6: Final answer
    x = 180,432.40

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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.