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Finding the Fourth Proportional to 389,609.79, 584,436.92 and 109,148.91

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Solution

The fourth proportional to 389,609.79, 584,436.92 and 109,148.91 is: 163,729.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,609.79 : 584,436.92 = 109,148.91 : x
  2. Step 2: Convert to fraction form
    389,609.79/584,436.92 = 109,148.91/x
  3. Step 3: Cross multiply
    389,609.79x = 584,436.92 × 109,148.91
  4. Step 4: Simplify right side
    389,609.79x = 63,790,652,236.01
  5. Step 5: Solve for x
    x = 63,790,652,236.01/389,609.79
  6. Step 6: Final answer
    x = 163,729.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.