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Finding the Fourth Proportional to 494,421.80, 743,187.90 and 485,090.60

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Solution

The fourth proportional to 494,421.80, 743,187.90 and 485,090.60 is: 729,161.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,421.80 : 743,187.90 = 485,090.60 : x
  2. Step 2: Convert to fraction form
    494,421.80/743,187.90 = 485,090.60/x
  3. Step 3: Cross multiply
    494,421.80x = 743,187.90 × 485,090.60
  4. Step 4: Simplify right side
    494,421.80x = 360,513,464,323.74
  5. Step 5: Solve for x
    x = 360,513,464,323.74/494,421.80
  6. Step 6: Final answer
    x = 729,161.75

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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.