Home / 1,188,403.72-1,639,989.64-644,552.44

Finding the Fourth Proportional to 1,188,403.72, 1,639,989.64 and 644,552.44

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Solution

The fourth proportional to 1,188,403.72, 1,639,989.64 and 644,552.44 is: 889,478.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,403.72 : 1,639,989.64 = 644,552.44 : x
  2. Step 2: Convert to fraction form
    1,188,403.72/1,639,989.64 = 644,552.44/x
  3. Step 3: Cross multiply
    1,188,403.72x = 1,639,989.64 × 644,552.44
  4. Step 4: Simplify right side
    1,188,403.72x = 1,057,059,324,036.72
  5. Step 5: Solve for x
    x = 1,057,059,324,036.72/1,188,403.72
  6. Step 6: Final answer
    x = 889,478.30

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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.