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Finding the Fourth Proportional to 515,738.96, 773,915.16 and 279,076.88

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Solution

The fourth proportional to 515,738.96, 773,915.16 and 279,076.88 is: 418,781.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,738.96 : 773,915.16 = 279,076.88 : x
  2. Step 2: Convert to fraction form
    515,738.96/773,915.16 = 279,076.88/x
  3. Step 3: Cross multiply
    515,738.96x = 773,915.16 × 279,076.88
  4. Step 4: Simplify right side
    515,738.96x = 215,981,828,237.50
  5. Step 5: Solve for x
    x = 215,981,828,237.50/515,738.96
  6. Step 6: Final answer
    x = 418,781.29

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1.5x scale

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.