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Finding the Fourth Proportional to 419,079.28, 628,557.48 and 138,600.56

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Solution

The fourth proportional to 419,079.28, 628,557.48 and 138,600.56 is: 207,880.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,079.28 : 628,557.48 = 138,600.56 : x
  2. Step 2: Convert to fraction form
    419,079.28/628,557.48 = 138,600.56/x
  3. Step 3: Cross multiply
    419,079.28x = 628,557.48 × 138,600.56
  4. Step 4: Simplify right side
    419,079.28x = 87,118,418,720.19
  5. Step 5: Solve for x
    x = 87,118,418,720.19/419,079.28
  6. Step 6: Final answer
    x = 207,880.52

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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.