Home / 421,540.70-631,868.18-261,616.32

Finding the Fourth Proportional to 421,540.70, 631,868.18 and 261,616.32

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Solution

The fourth proportional to 421,540.70, 631,868.18 and 261,616.32 is: 392,149.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,540.70 : 631,868.18 = 261,616.32 : x
  2. Step 2: Convert to fraction form
    421,540.70/631,868.18 = 261,616.32/x
  3. Step 3: Cross multiply
    421,540.70x = 631,868.18 × 261,616.32
  4. Step 4: Simplify right side
    421,540.70x = 165,307,026,668.62
  5. Step 5: Solve for x
    x = 165,307,026,668.62/421,540.70
  6. Step 6: Final answer
    x = 392,149.63

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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.