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Finding the Fourth Proportional to 489,918.36, 676,035 and 275,082

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Solution

The fourth proportional to 489,918.36, 676,035 and 275,082 is: 379,583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,918.36 : 676,035 = 275,082 : x
  2. Step 2: Convert to fraction form
    489,918.36/676,035 = 275,082/x
  3. Step 3: Cross multiply
    489,918.36x = 676,035 × 275,082
  4. Step 4: Simplify right side
    489,918.36x = 185,965,059,870
  5. Step 5: Solve for x
    x = 185,965,059,870/489,918.36
  6. Step 6: Final answer
    x = 379,583.77

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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.