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Finding the Fourth Proportional to 720,111.43, 1,079,917 and 400,750.66

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Solution

The fourth proportional to 720,111.43, 1,079,917 and 400,750.66 is: 600,986.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,111.43 : 1,079,917 = 400,750.66 : x
  2. Step 2: Convert to fraction form
    720,111.43/1,079,917 = 400,750.66/x
  3. Step 3: Cross multiply
    720,111.43x = 1,079,917 × 400,750.66
  4. Step 4: Simplify right side
    720,111.43x = 432,777,450,495.22
  5. Step 5: Solve for x
    x = 432,777,450,495.22/720,111.43
  6. Step 6: Final answer
    x = 600,986.78

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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.