Home / 820,942.86-1,231,455.78-315,326.58

Finding the Fourth Proportional to 820,942.86, 1,231,455.78 and 315,326.58

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Solution

The fourth proportional to 820,942.86, 1,231,455.78 and 315,326.58 is: 473,005.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,942.86 : 1,231,455.78 = 315,326.58 : x
  2. Step 2: Convert to fraction form
    820,942.86/1,231,455.78 = 315,326.58/x
  3. Step 3: Cross multiply
    820,942.86x = 1,231,455.78 × 315,326.58
  4. Step 4: Simplify right side
    820,942.86x = 388,310,739,528.63
  5. Step 5: Solve for x
    x = 388,310,739,528.63/820,942.86
  6. Step 6: Final answer
    x = 473,005.81

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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.