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Finding the Fourth Proportional to 251,719.80, 377,579.70 and 205,639.80

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Solution

The fourth proportional to 251,719.80, 377,579.70 and 205,639.80 is: 308,459.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,719.80 : 377,579.70 = 205,639.80 : x
  2. Step 2: Convert to fraction form
    251,719.80/377,579.70 = 205,639.80/x
  3. Step 3: Cross multiply
    251,719.80x = 377,579.70 × 205,639.80
  4. Step 4: Simplify right side
    251,719.80x = 77,645,413,992.06
  5. Step 5: Solve for x
    x = 77,645,413,992.06/251,719.80
  6. Step 6: Final answer
    x = 308,459.70

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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.