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Finding the Fourth Proportional to 309,691.77, 427,286.77 and 180,635.87

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Solution

The fourth proportional to 309,691.77, 427,286.77 and 180,635.87 is: 249,226.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,691.77 : 427,286.77 = 180,635.87 : x
  2. Step 2: Convert to fraction form
    309,691.77/427,286.77 = 180,635.87/x
  3. Step 3: Cross multiply
    309,691.77x = 427,286.77 × 180,635.87
  4. Step 4: Simplify right side
    309,691.77x = 77,183,317,438.44
  5. Step 5: Solve for x
    x = 77,183,317,438.44/309,691.77
  6. Step 6: Final answer
    x = 249,226.25

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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.