Home / 811,200.12-1,215,942.12-305,542.31

Finding the Fourth Proportional to 811,200.12, 1,215,942.12 and 305,542.31

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Solution

The fourth proportional to 811,200.12, 1,215,942.12 and 305,542.31 is: 457,990.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,200.12 : 1,215,942.12 = 305,542.31 : x
  2. Step 2: Convert to fraction form
    811,200.12/1,215,942.12 = 305,542.31/x
  3. Step 3: Cross multiply
    811,200.12x = 1,215,942.12 × 305,542.31
  4. Step 4: Simplify right side
    811,200.12x = 371,521,758,091.39
  5. Step 5: Solve for x
    x = 371,521,758,091.39/811,200.12
  6. Step 6: Final answer
    x = 457,990.27

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1.5x scale

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.