Home / 427,663.71-641,638.08-143,382.38

Finding the Fourth Proportional to 427,663.71, 641,638.08 and 143,382.38

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Solution

The fourth proportional to 427,663.71, 641,638.08 and 143,382.38 is: 215,121.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,663.71 : 641,638.08 = 143,382.38 : x
  2. Step 2: Convert to fraction form
    427,663.71/641,638.08 = 143,382.38/x
  3. Step 3: Cross multiply
    427,663.71x = 641,638.08 × 143,382.38
  4. Step 4: Simplify right side
    427,663.71x = 91,999,591,800.84
  5. Step 5: Solve for x
    x = 91,999,591,800.84/427,663.71
  6. Step 6: Final answer
    x = 215,121.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.