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Finding the Fourth Proportional to 447,800.79, 671,789.78 and 127,955.55

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Solution

The fourth proportional to 447,800.79, 671,789.78 and 127,955.55 is: 191,958.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,800.79 : 671,789.78 = 127,955.55 : x
  2. Step 2: Convert to fraction form
    447,800.79/671,789.78 = 127,955.55/x
  3. Step 3: Cross multiply
    447,800.79x = 671,789.78 × 127,955.55
  4. Step 4: Simplify right side
    447,800.79x = 85,959,230,784.28
  5. Step 5: Solve for x
    x = 85,959,230,784.28/447,800.79
  6. Step 6: Final answer
    x = 191,958.64

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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.