Home / 1,215,942.85-1,678,007.73-664,659.30

Finding the Fourth Proportional to 1,215,942.85, 1,678,007.73 and 664,659.30

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Solution

The fourth proportional to 1,215,942.85, 1,678,007.73 and 664,659.30 is: 917,233.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,942.85 : 1,678,007.73 = 664,659.30 : x
  2. Step 2: Convert to fraction form
    1,215,942.85/1,678,007.73 = 664,659.30/x
  3. Step 3: Cross multiply
    1,215,942.85x = 1,678,007.73 × 664,659.30
  4. Step 4: Simplify right side
    1,215,942.85x = 1,115,303,452,001.39
  5. Step 5: Solve for x
    x = 1,115,303,452,001.39/1,215,942.85
  6. Step 6: Final answer
    x = 917,233.45

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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.