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Finding the Fourth Proportional to 389,477.85, 537,481.62 and 219,722.91

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Solution

The fourth proportional to 389,477.85, 537,481.62 and 219,722.91 is: 303,218.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,477.85 : 537,481.62 = 219,722.91 : x
  2. Step 2: Convert to fraction form
    389,477.85/537,481.62 = 219,722.91/x
  3. Step 3: Cross multiply
    389,477.85x = 537,481.62 × 219,722.91
  4. Step 4: Simplify right side
    389,477.85x = 118,097,025,617.91
  5. Step 5: Solve for x
    x = 118,097,025,617.91/389,477.85
  6. Step 6: Final answer
    x = 303,218.85

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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.