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Finding the Fourth Proportional to 299,717.82, 447,390.36 and 261,883.44

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Solution

The fourth proportional to 299,717.82, 447,390.36 and 261,883.44 is: 390,914.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,717.82 : 447,390.36 = 261,883.44 : x
  2. Step 2: Convert to fraction form
    299,717.82/447,390.36 = 261,883.44/x
  3. Step 3: Cross multiply
    299,717.82x = 447,390.36 × 261,883.44
  4. Step 4: Simplify right side
    299,717.82x = 117,164,126,499.64
  5. Step 5: Solve for x
    x = 117,164,126,499.64/299,717.82
  6. Step 6: Final answer
    x = 390,914.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.