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Finding the Fourth Proportional to 486,138.60, 729,426.60 and 170,821.80

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Solution

The fourth proportional to 486,138.60, 729,426.60 and 170,821.80 is: 256,309.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,138.60 : 729,426.60 = 170,821.80 : x
  2. Step 2: Convert to fraction form
    486,138.60/729,426.60 = 170,821.80/x
  3. Step 3: Cross multiply
    486,138.60x = 729,426.60 × 170,821.80
  4. Step 4: Simplify right side
    486,138.60x = 124,601,964,779.88
  5. Step 5: Solve for x
    x = 124,601,964,779.88/486,138.60
  6. Step 6: Final answer
    x = 256,309.55

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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.