Home / 1,187,143.33-1,638,287.91-728,511.22

Finding the Fourth Proportional to 1,187,143.33, 1,638,287.91 and 728,511.22

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Solution

The fourth proportional to 1,187,143.33, 1,638,287.91 and 728,511.22 is: 1,005,363.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,143.33 : 1,638,287.91 = 728,511.22 : x
  2. Step 2: Convert to fraction form
    1,187,143.33/1,638,287.91 = 728,511.22/x
  3. Step 3: Cross multiply
    1,187,143.33x = 1,638,287.91 × 728,511.22
  4. Step 4: Simplify right side
    1,187,143.33x = 1,193,511,124,025.35
  5. Step 5: Solve for x
    x = 1,193,511,124,025.35/1,187,143.33
  6. Step 6: Final answer
    x = 1,005,363.96

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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.