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Finding the Fourth Proportional to 320,623.60, 480,978.96 and 133,591.36

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Solution

The fourth proportional to 320,623.60, 480,978.96 and 133,591.36 is: 200,405.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,623.60 : 480,978.96 = 133,591.36 : x
  2. Step 2: Convert to fraction form
    320,623.60/480,978.96 = 133,591.36/x
  3. Step 3: Cross multiply
    320,623.60x = 480,978.96 × 133,591.36
  4. Step 4: Simplify right side
    320,623.60x = 64,254,633,397.79
  5. Step 5: Solve for x
    x = 64,254,633,397.79/320,623.60
  6. Step 6: Final answer
    x = 200,405.19

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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.