Home / 1,215,685.78-1,821,898.65-946,139.38

Finding the Fourth Proportional to 1,215,685.78, 1,821,898.65 and 946,139.38

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Solution

The fourth proportional to 1,215,685.78, 1,821,898.65 and 946,139.38 is: 1,417,940.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,685.78 : 1,821,898.65 = 946,139.38 : x
  2. Step 2: Convert to fraction form
    1,215,685.78/1,821,898.65 = 946,139.38/x
  3. Step 3: Cross multiply
    1,215,685.78x = 1,821,898.65 × 946,139.38
  4. Step 4: Simplify right side
    1,215,685.78x = 1,723,770,059,133.84
  5. Step 5: Solve for x
    x = 1,723,770,059,133.84/1,215,685.78
  6. Step 6: Final answer
    x = 1,417,940.46

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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.