Home / 726,199.40-1,086,969.95-388,395.38

Finding the Fourth Proportional to 726,199.40, 1,086,969.95 and 388,395.38

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Solution

The fourth proportional to 726,199.40, 1,086,969.95 and 388,395.38 is: 581,347.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,199.40 : 1,086,969.95 = 388,395.38 : x
  2. Step 2: Convert to fraction form
    726,199.40/1,086,969.95 = 388,395.38/x
  3. Step 3: Cross multiply
    726,199.40x = 1,086,969.95 × 388,395.38
  4. Step 4: Simplify right side
    726,199.40x = 422,174,109,010.76
  5. Step 5: Solve for x
    x = 422,174,109,010.76/726,199.40
  6. Step 6: Final answer
    x = 581,347.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.