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Finding the Fourth Proportional to 320,607.44, 481,021.64 and 143,236.88

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Solution

The fourth proportional to 320,607.44, 481,021.64 and 143,236.88 is: 214,904.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,607.44 : 481,021.64 = 143,236.88 : x
  2. Step 2: Convert to fraction form
    320,607.44/481,021.64 = 143,236.88/x
  3. Step 3: Cross multiply
    320,607.44x = 481,021.64 × 143,236.88
  4. Step 4: Simplify right side
    320,607.44x = 68,900,038,926.08
  5. Step 5: Solve for x
    x = 68,900,038,926.08/320,607.44
  6. Step 6: Final answer
    x = 214,904.68

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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.