Home / 1,187,401.75-1,638,620.04-643,537.38

Finding the Fourth Proportional to 1,187,401.75, 1,638,620.04 and 643,537.38

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Solution

The fourth proportional to 1,187,401.75, 1,638,620.04 and 643,537.38 is: 888,084.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,401.75 : 1,638,620.04 = 643,537.38 : x
  2. Step 2: Convert to fraction form
    1,187,401.75/1,638,620.04 = 643,537.38/x
  3. Step 3: Cross multiply
    1,187,401.75x = 1,638,620.04 × 643,537.38
  4. Step 4: Simplify right side
    1,187,401.75x = 1,054,513,255,915.19
  5. Step 5: Solve for x
    x = 1,054,513,255,915.19/1,187,401.75
  6. Step 6: Final answer
    x = 888,084.64

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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.