Home / 820,178.40-1,230,212.91-394,019.58

Finding the Fourth Proportional to 820,178.40, 1,230,212.91 and 394,019.58

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Solution

The fourth proportional to 820,178.40, 1,230,212.91 and 394,019.58 is: 591,003.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,178.40 : 1,230,212.91 = 394,019.58 : x
  2. Step 2: Convert to fraction form
    820,178.40/1,230,212.91 = 394,019.58/x
  3. Step 3: Cross multiply
    820,178.40x = 1,230,212.91 × 394,019.58
  4. Step 4: Simplify right side
    820,178.40x = 484,727,974,108.78
  5. Step 5: Solve for x
    x = 484,727,974,108.78/820,178.40
  6. Step 6: Final answer
    x = 591,003.10

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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.