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Finding the Fourth Proportional to 279,410.72, 385,576.10 and 158,544.80

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Solution

The fourth proportional to 279,410.72, 385,576.10 and 158,544.80 is: 218,785.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,410.72 : 385,576.10 = 158,544.80 : x
  2. Step 2: Convert to fraction form
    279,410.72/385,576.10 = 158,544.80/x
  3. Step 3: Cross multiply
    279,410.72x = 385,576.10 × 158,544.80
  4. Step 4: Simplify right side
    279,410.72x = 61,131,082,938.68
  5. Step 5: Solve for x
    x = 61,131,082,938.68/279,410.72
  6. Step 6: Final answer
    x = 218,785.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.