Home / 1,187,361.40-1,638,640.72-722,396.72

Finding the Fourth Proportional to 1,187,361.40, 1,638,640.72 and 722,396.72

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Solution

The fourth proportional to 1,187,361.40, 1,638,640.72 and 722,396.72 is: 996,957.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,361.40 : 1,638,640.72 = 722,396.72 : x
  2. Step 2: Convert to fraction form
    1,187,361.40/1,638,640.72 = 722,396.72/x
  3. Step 3: Cross multiply
    1,187,361.40x = 1,638,640.72 × 722,396.72
  4. Step 4: Simplify right side
    1,187,361.40x = 1,183,748,681,386.44
  5. Step 5: Solve for x
    x = 1,183,748,681,386.44/1,187,361.40
  6. Step 6: Final answer
    x = 996,957.36

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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.