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Finding the Fourth Proportional to 384,090.80, 576,136.20 and 347,349.20

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Solution

The fourth proportional to 384,090.80, 576,136.20 and 347,349.20 is: 521,023.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,090.80 : 576,136.20 = 347,349.20 : x
  2. Step 2: Convert to fraction form
    384,090.80/576,136.20 = 347,349.20/x
  3. Step 3: Cross multiply
    384,090.80x = 576,136.20 × 347,349.20
  4. Step 4: Simplify right side
    384,090.80x = 200,120,448,161.04
  5. Step 5: Solve for x
    x = 200,120,448,161.04/384,090.80
  6. Step 6: Final answer
    x = 521,023.80

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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.