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Finding the Fourth Proportional to 399,563.88, 599,145.18 and 133,230.12

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Solution

The fourth proportional to 399,563.88, 599,145.18 and 133,230.12 is: 199,778.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,563.88 : 599,145.18 = 133,230.12 : x
  2. Step 2: Convert to fraction form
    399,563.88/599,145.18 = 133,230.12/x
  3. Step 3: Cross multiply
    399,563.88x = 599,145.18 × 133,230.12
  4. Step 4: Simplify right side
    399,563.88x = 79,824,184,228.82
  5. Step 5: Solve for x
    x = 79,824,184,228.82/399,563.88
  6. Step 6: Final answer
    x = 199,778.28

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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.