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Finding the Fourth Proportional to 447,608.39, 671,434.90 and 127,807.70

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Solution

The fourth proportional to 447,608.39, 671,434.90 and 127,807.70 is: 191,717.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,608.39 : 671,434.90 = 127,807.70 : x
  2. Step 2: Convert to fraction form
    447,608.39/671,434.90 = 127,807.70/x
  3. Step 3: Cross multiply
    447,608.39x = 671,434.90 × 127,807.70
  4. Step 4: Simplify right side
    447,608.39x = 85,814,549,629.69
  5. Step 5: Solve for x
    x = 85,814,549,629.69/447,608.39
  6. Step 6: Final answer
    x = 191,717.92

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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.