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Finding the Fourth Proportional to 389,439.89, 537,443.39 and 219,673.97

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Solution

The fourth proportional to 389,439.89, 537,443.39 and 219,673.97 is: 303,159.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,439.89 : 537,443.39 = 219,673.97 : x
  2. Step 2: Convert to fraction form
    389,439.89/537,443.39 = 219,673.97/x
  3. Step 3: Cross multiply
    389,439.89x = 537,443.39 × 219,673.97
  4. Step 4: Simplify right side
    389,439.89x = 118,062,322,033.19
  5. Step 5: Solve for x
    x = 118,062,322,033.19/389,439.89
  6. Step 6: Final answer
    x = 303,159.29

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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.