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Finding the Fourth Proportional to 391,893.89, 540,834.97 and 219,866.35

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Solution

The fourth proportional to 391,893.89, 540,834.97 and 219,866.35 is: 303,427.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,893.89 : 540,834.97 = 219,866.35 : x
  2. Step 2: Convert to fraction form
    391,893.89/540,834.97 = 219,866.35/x
  3. Step 3: Cross multiply
    391,893.89x = 540,834.97 × 219,866.35
  4. Step 4: Simplify right side
    391,893.89x = 118,911,408,904.51
  5. Step 5: Solve for x
    x = 118,911,408,904.51/391,893.89
  6. Step 6: Final answer
    x = 303,427.56

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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.