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Finding the Fourth Proportional to 389,439.09, 537,404.22 and 219,662.28

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Solution

The fourth proportional to 389,439.09, 537,404.22 and 219,662.28 is: 303,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,439.09 : 537,404.22 = 219,662.28 : x
  2. Step 2: Convert to fraction form
    389,439.09/537,404.22 = 219,662.28/x
  3. Step 3: Cross multiply
    389,439.09x = 537,404.22 × 219,662.28
  4. Step 4: Simplify right side
    389,439.09x = 118,047,436,246.82
  5. Step 5: Solve for x
    x = 118,047,436,246.82/389,439.09
  6. Step 6: Final answer
    x = 303,121.69

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1.5x scale

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.