Home / 1,187,591.79-1,638,832.77-643,715.90

Finding the Fourth Proportional to 1,187,591.79, 1,638,832.77 and 643,715.90

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Solution

The fourth proportional to 1,187,591.79, 1,638,832.77 and 643,715.90 is: 888,304.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,591.79 : 1,638,832.77 = 643,715.90 : x
  2. Step 2: Convert to fraction form
    1,187,591.79/1,638,832.77 = 643,715.90/x
  3. Step 3: Cross multiply
    1,187,591.79x = 1,638,832.77 × 643,715.90
  4. Step 4: Simplify right side
    1,187,591.79x = 1,054,942,716,382.99
  5. Step 5: Solve for x
    x = 1,054,942,716,382.99/1,187,591.79
  6. Step 6: Final answer
    x = 888,304.15

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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.