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Finding the Fourth Proportional to 420,696, 631,044 and 125,208

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Solution

The fourth proportional to 420,696, 631,044 and 125,208 is: 187,812

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,696 : 631,044 = 125,208 : x
  2. Step 2: Convert to fraction form
    420,696/631,044 = 125,208/x
  3. Step 3: Cross multiply
    420,696x = 631,044 × 125,208
  4. Step 4: Simplify right side
    420,696x = 79,011,757,152
  5. Step 5: Solve for x
    x = 79,011,757,152/420,696
  6. Step 6: Final answer
    x = 187,812

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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.