Home / 1,187,212.29-1,638,382.89-728,580.16

Finding the Fourth Proportional to 1,187,212.29, 1,638,382.89 and 728,580.16

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Solution

The fourth proportional to 1,187,212.29, 1,638,382.89 and 728,580.16 is: 1,005,458.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,212.29 : 1,638,382.89 = 728,580.16 : x
  2. Step 2: Convert to fraction form
    1,187,212.29/1,638,382.89 = 728,580.16/x
  3. Step 3: Cross multiply
    1,187,212.29x = 1,638,382.89 × 728,580.16
  4. Step 4: Simplify right side
    1,187,212.29x = 1,193,693,268,137.46
  5. Step 5: Solve for x
    x = 1,193,693,268,137.46/1,187,212.29
  6. Step 6: Final answer
    x = 1,005,458.99

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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.