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Finding the Fourth Proportional to 432,090.80, 648,136.20 and 405,825.20

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Solution

The fourth proportional to 432,090.80, 648,136.20 and 405,825.20 is: 608,737.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,090.80 : 648,136.20 = 405,825.20 : x
  2. Step 2: Convert to fraction form
    432,090.80/648,136.20 = 405,825.20/x
  3. Step 3: Cross multiply
    432,090.80x = 648,136.20 × 405,825.20
  4. Step 4: Simplify right side
    432,090.80x = 263,030,002,992.24
  5. Step 5: Solve for x
    x = 263,030,002,992.24/432,090.80
  6. Step 6: Final answer
    x = 608,737.80

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1.5x scale

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.