Home / 1,187,142.33-1,638,286.53-728,510.22

Finding the Fourth Proportional to 1,187,142.33, 1,638,286.53 and 728,510.22

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Solution

The fourth proportional to 1,187,142.33, 1,638,286.53 and 728,510.22 is: 1,005,362.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,142.33 : 1,638,286.53 = 728,510.22 : x
  2. Step 2: Convert to fraction form
    1,187,142.33/1,638,286.53 = 728,510.22/x
  3. Step 3: Cross multiply
    1,187,142.33x = 1,638,286.53 × 728,510.22
  4. Step 4: Simplify right side
    1,187,142.33x = 1,193,508,480,393.34
  5. Step 5: Solve for x
    x = 1,193,508,480,393.34/1,187,142.33
  6. Step 6: Final answer
    x = 1,005,362.58

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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.