Home / 455,320.80-682,981.20-431,992.80

Finding the Fourth Proportional to 455,320.80, 682,981.20 and 431,992.80

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Solution

The fourth proportional to 455,320.80, 682,981.20 and 431,992.80 is: 647,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,320.80 : 682,981.20 = 431,992.80 : x
  2. Step 2: Convert to fraction form
    455,320.80/682,981.20 = 431,992.80/x
  3. Step 3: Cross multiply
    455,320.80x = 682,981.20 × 431,992.80
  4. Step 4: Simplify right side
    455,320.80x = 295,042,960,935.36
  5. Step 5: Solve for x
    x = 295,042,960,935.36/455,320.80
  6. Step 6: Final answer
    x = 647,989.20

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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.