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Finding the Fourth Proportional to 320,762.88, 481,188.96 and 133,731.36

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Solution

The fourth proportional to 320,762.88, 481,188.96 and 133,731.36 is: 200,615.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,762.88 : 481,188.96 = 133,731.36 : x
  2. Step 2: Convert to fraction form
    320,762.88/481,188.96 = 133,731.36/x
  3. Step 3: Cross multiply
    320,762.88x = 481,188.96 × 133,731.36
  4. Step 4: Simplify right side
    320,762.88x = 64,350,054,037.79
  5. Step 5: Solve for x
    x = 64,350,054,037.79/320,762.88
  6. Step 6: Final answer
    x = 200,615.65

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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.