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Finding the Fourth Proportional to 481,690.40, 721,844.40 and 354,336.80

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Solution

The fourth proportional to 481,690.40, 721,844.40 and 354,336.80 is: 530,996.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,690.40 : 721,844.40 = 354,336.80 : x
  2. Step 2: Convert to fraction form
    481,690.40/721,844.40 = 354,336.80/x
  3. Step 3: Cross multiply
    481,690.40x = 721,844.40 × 354,336.80
  4. Step 4: Simplify right side
    481,690.40x = 255,776,034,793.92
  5. Step 5: Solve for x
    x = 255,776,034,793.92/481,690.40
  6. Step 6: Final answer
    x = 530,996.75

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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.