Home / 643,388.96-964,455.85-306,339.05

Finding the Fourth Proportional to 643,388.96, 964,455.85 and 306,339.05

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Solution

The fourth proportional to 643,388.96, 964,455.85 and 306,339.05 is: 459,209.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,388.96 : 964,455.85 = 306,339.05 : x
  2. Step 2: Convert to fraction form
    643,388.96/964,455.85 = 306,339.05/x
  3. Step 3: Cross multiply
    643,388.96x = 964,455.85 × 306,339.05
  4. Step 4: Simplify right side
    643,388.96x = 295,450,488,855.94
  5. Step 5: Solve for x
    x = 295,450,488,855.94/643,388.96
  6. Step 6: Final answer
    x = 459,209.76

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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.