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Finding the Fourth Proportional to 393,257.90, 589,899.92 and 108,951.31

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Solution

The fourth proportional to 393,257.90, 589,899.92 and 108,951.31 is: 163,430.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,257.90 : 589,899.92 = 108,951.31 : x
  2. Step 2: Convert to fraction form
    393,257.90/589,899.92 = 108,951.31/x
  3. Step 3: Cross multiply
    393,257.90x = 589,899.92 × 108,951.31
  4. Step 4: Simplify right side
    393,257.90x = 64,270,369,245.51
  5. Step 5: Solve for x
    x = 64,270,369,245.51/393,257.90
  6. Step 6: Final answer
    x = 163,430.59

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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.