Home / 1,187,402.75-1,638,621.42-643,538.38

Finding the Fourth Proportional to 1,187,402.75, 1,638,621.42 and 643,538.38

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Solution

The fourth proportional to 1,187,402.75, 1,638,621.42 and 643,538.38 is: 888,086.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,402.75 : 1,638,621.42 = 643,538.38 : x
  2. Step 2: Convert to fraction form
    1,187,402.75/1,638,621.42 = 643,538.38/x
  3. Step 3: Cross multiply
    1,187,402.75x = 1,638,621.42 × 643,538.38
  4. Step 4: Simplify right side
    1,187,402.75x = 1,054,515,774,060.10
  5. Step 5: Solve for x
    x = 1,054,515,774,060.10/1,187,402.75
  6. Step 6: Final answer
    x = 888,086.01

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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.