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Finding the Fourth Proportional to 490,772.01, 735,860.60 and 320,121.21

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Solution

The fourth proportional to 490,772.01, 735,860.60 and 320,121.21 is: 479,987.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,772.01 : 735,860.60 = 320,121.21 : x
  2. Step 2: Convert to fraction form
    490,772.01/735,860.60 = 320,121.21/x
  3. Step 3: Cross multiply
    490,772.01x = 735,860.60 × 320,121.21
  4. Step 4: Simplify right side
    490,772.01x = 235,564,584,062.72
  5. Step 5: Solve for x
    x = 235,564,584,062.72/490,772.01
  6. Step 6: Final answer
    x = 479,987.81

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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.