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Finding the Fourth Proportional to 391,564.26, 540,396.72 and 219,511.44

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Solution

The fourth proportional to 391,564.26, 540,396.72 and 219,511.44 is: 302,947.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,564.26 : 540,396.72 = 219,511.44 : x
  2. Step 2: Convert to fraction form
    391,564.26/540,396.72 = 219,511.44/x
  3. Step 3: Cross multiply
    391,564.26x = 540,396.72 × 219,511.44
  4. Step 4: Simplify right side
    391,564.26x = 118,623,262,178.48
  5. Step 5: Solve for x
    x = 118,623,262,178.48/391,564.26
  6. Step 6: Final answer
    x = 302,947.11

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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.