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Finding the Fourth Proportional to 394,739.80, 591,818.10 and 169,916.20

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Solution

The fourth proportional to 394,739.80, 591,818.10 and 169,916.20 is: 254,748.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,739.80 : 591,818.10 = 169,916.20 : x
  2. Step 2: Convert to fraction form
    394,739.80/591,818.10 = 169,916.20/x
  3. Step 3: Cross multiply
    394,739.80x = 591,818.10 × 169,916.20
  4. Step 4: Simplify right side
    394,739.80x = 100,559,482,643.22
  5. Step 5: Solve for x
    x = 100,559,482,643.22/394,739.80
  6. Step 6: Final answer
    x = 254,748.78

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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.