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Finding the Fourth Proportional to 391,840.51, 540,745.99 and 219,796.66

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Solution

The fourth proportional to 391,840.51, 540,745.99 and 219,796.66 is: 303,322.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,840.51 : 540,745.99 = 219,796.66 : x
  2. Step 2: Convert to fraction form
    391,840.51/540,745.99 = 219,796.66/x
  3. Step 3: Cross multiply
    391,840.51x = 540,745.99 × 219,796.66
  4. Step 4: Simplify right side
    391,840.51x = 118,854,162,636.83
  5. Step 5: Solve for x
    x = 118,854,162,636.83/391,840.51
  6. Step 6: Final answer
    x = 303,322.81

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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.