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Finding the Fourth Proportional to 486,447.73, 671,308.76 and 305,167.30

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Solution

The fourth proportional to 486,447.73, 671,308.76 and 305,167.30 is: 421,137.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,447.73 : 671,308.76 = 305,167.30 : x
  2. Step 2: Convert to fraction form
    486,447.73/671,308.76 = 305,167.30/x
  3. Step 3: Cross multiply
    486,447.73x = 671,308.76 × 305,167.30
  4. Step 4: Simplify right side
    486,447.73x = 204,861,480,840.19
  5. Step 5: Solve for x
    x = 204,861,480,840.19/486,447.73
  6. Step 6: Final answer
    x = 421,137.71

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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.