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Finding the Fourth Proportional to 489,865.59, 676,008.54 and 275,000.13

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Solution

The fourth proportional to 489,865.59, 676,008.54 and 275,000.13 is: 379,496.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,865.59 : 676,008.54 = 275,000.13 : x
  2. Step 2: Convert to fraction form
    489,865.59/676,008.54 = 275,000.13/x
  3. Step 3: Cross multiply
    489,865.59x = 676,008.54 × 275,000.13
  4. Step 4: Simplify right side
    489,865.59x = 185,902,436,381.11
  5. Step 5: Solve for x
    x = 185,902,436,381.11/489,865.59
  6. Step 6: Final answer
    x = 379,496.83

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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.