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Finding the Fourth Proportional to 279,139.83, 385,201.84 and 151,815.52

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Solution

The fourth proportional to 279,139.83, 385,201.84 and 151,815.52 is: 209,499.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,139.83 : 385,201.84 = 151,815.52 : x
  2. Step 2: Convert to fraction form
    279,139.83/385,201.84 = 151,815.52/x
  3. Step 3: Cross multiply
    279,139.83x = 385,201.84 × 151,815.52
  4. Step 4: Simplify right side
    279,139.83x = 58,479,617,644.56
  5. Step 5: Solve for x
    x = 58,479,617,644.56/279,139.83
  6. Step 6: Final answer
    x = 209,499.37

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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.