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Finding the Fourth Proportional to 283,801.16, 391,648.25 and 156,481.28

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Solution

The fourth proportional to 283,801.16, 391,648.25 and 156,481.28 is: 215,945.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,801.16 : 391,648.25 = 156,481.28 : x
  2. Step 2: Convert to fraction form
    283,801.16/391,648.25 = 156,481.28/x
  3. Step 3: Cross multiply
    283,801.16x = 391,648.25 × 156,481.28
  4. Step 4: Simplify right side
    283,801.16x = 61,285,619,469.76
  5. Step 5: Solve for x
    x = 61,285,619,469.76/283,801.16
  6. Step 6: Final answer
    x = 215,945.63

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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.