Home / 638,762.09-880,682.92-420,936.89

Finding the Fourth Proportional to 638,762.09, 880,682.92 and 420,936.89

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Solution

The fourth proportional to 638,762.09, 880,682.92 and 420,936.89 is: 580,359.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,762.09 : 880,682.92 = 420,936.89 : x
  2. Step 2: Convert to fraction form
    638,762.09/880,682.92 = 420,936.89/x
  3. Step 3: Cross multiply
    638,762.09x = 880,682.92 × 420,936.89
  4. Step 4: Simplify right side
    638,762.09x = 370,711,922,912.82
  5. Step 5: Solve for x
    x = 370,711,922,912.82/638,762.09
  6. Step 6: Final answer
    x = 580,359.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.