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Finding the Fourth Proportional to 368,138.80, 552,499.80 and 143,606.80

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Solution

The fourth proportional to 368,138.80, 552,499.80 and 143,606.80 is: 215,523.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,138.80 : 552,499.80 = 143,606.80 : x
  2. Step 2: Convert to fraction form
    368,138.80/552,499.80 = 143,606.80/x
  3. Step 3: Cross multiply
    368,138.80x = 552,499.80 × 143,606.80
  4. Step 4: Simplify right side
    368,138.80x = 79,342,728,278.64
  5. Step 5: Solve for x
    x = 79,342,728,278.64/368,138.80
  6. Step 6: Final answer
    x = 215,523.95

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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.