Home / 1,187,027.79-1,638,096.04-643,178.29

Finding the Fourth Proportional to 1,187,027.79, 1,638,096.04 and 643,178.29

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Solution

The fourth proportional to 1,187,027.79, 1,638,096.04 and 643,178.29 is: 887,584.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,027.79 : 1,638,096.04 = 643,178.29 : x
  2. Step 2: Convert to fraction form
    1,187,027.79/1,638,096.04 = 643,178.29/x
  3. Step 3: Cross multiply
    1,187,027.79x = 1,638,096.04 × 643,178.29
  4. Step 4: Simplify right side
    1,187,027.79x = 1,053,587,809,862.97
  5. Step 5: Solve for x
    x = 1,053,587,809,862.97/1,187,027.79
  6. Step 6: Final answer
    x = 887,584.79

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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.