Home / 421,511.45-631,824.30-261,587.07

Finding the Fourth Proportional to 421,511.45, 631,824.30 and 261,587.07

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Solution

The fourth proportional to 421,511.45, 631,824.30 and 261,587.07 is: 392,105.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,511.45 : 631,824.30 = 261,587.07 : x
  2. Step 2: Convert to fraction form
    421,511.45/631,824.30 = 261,587.07/x
  3. Step 3: Cross multiply
    421,511.45x = 631,824.30 × 261,587.07
  4. Step 4: Simplify right side
    421,511.45x = 165,277,067,391.80
  5. Step 5: Solve for x
    x = 165,277,067,391.80/421,511.45
  6. Step 6: Final answer
    x = 392,105.76

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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.