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Finding the Fourth Proportional to 283,991.20, 391,879.11 and 167,686.54

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Solution

The fourth proportional to 283,991.20, 391,879.11 and 167,686.54 is: 231,390.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,991.20 : 391,879.11 = 167,686.54 : x
  2. Step 2: Convert to fraction form
    283,991.20/391,879.11 = 167,686.54/x
  3. Step 3: Cross multiply
    283,991.20x = 391,879.11 × 167,686.54
  4. Step 4: Simplify right side
    283,991.20x = 65,712,851,703.31
  5. Step 5: Solve for x
    x = 65,712,851,703.31/283,991.20
  6. Step 6: Final answer
    x = 231,390.45

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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.