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Finding the Fourth Proportional to 389,611.79, 584,439.92 and 109,150.91

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Solution

The fourth proportional to 389,611.79, 584,439.92 and 109,150.91 is: 163,732.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,611.79 : 584,439.92 = 109,150.91 : x
  2. Step 2: Convert to fraction form
    389,611.79/584,439.92 = 109,150.91/x
  3. Step 3: Cross multiply
    389,611.79x = 584,439.92 × 109,150.91
  4. Step 4: Simplify right side
    389,611.79x = 63,792,149,108.33
  5. Step 5: Solve for x
    x = 63,792,149,108.33/389,611.79
  6. Step 6: Final answer
    x = 163,732.59

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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.