Home / 1,187,071.97-1,638,189.81-728,439.93

Finding the Fourth Proportional to 1,187,071.97, 1,638,189.81 and 728,439.93

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Solution

The fourth proportional to 1,187,071.97, 1,638,189.81 and 728,439.93 is: 1,005,265.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,071.97 : 1,638,189.81 = 728,439.93 : x
  2. Step 2: Convert to fraction form
    1,187,071.97/1,638,189.81 = 728,439.93/x
  3. Step 3: Cross multiply
    1,187,071.97x = 1,638,189.81 × 728,439.93
  4. Step 4: Simplify right side
    1,187,071.97x = 1,193,322,870,523.11
  5. Step 5: Solve for x
    x = 1,193,322,870,523.11/1,187,071.97
  6. Step 6: Final answer
    x = 1,005,265.82

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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.