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Finding the Fourth Proportional to 320,499.60, 480,115.80 and 281,101.20

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Solution

The fourth proportional to 320,499.60, 480,115.80 and 281,101.20 is: 421,096.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,499.60 : 480,115.80 = 281,101.20 : x
  2. Step 2: Convert to fraction form
    320,499.60/480,115.80 = 281,101.20/x
  3. Step 3: Cross multiply
    320,499.60x = 480,115.80 × 281,101.20
  4. Step 4: Simplify right side
    320,499.60x = 134,961,127,518.96
  5. Step 5: Solve for x
    x = 134,961,127,518.96/320,499.60
  6. Step 6: Final answer
    x = 421,096.09

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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.