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Finding the Fourth Proportional to 320,491.60, 480,559.93 and 131,084.98

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Solution

The fourth proportional to 320,491.60, 480,559.93 and 131,084.98 is: 196,554.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,491.60 : 480,559.93 = 131,084.98 : x
  2. Step 2: Convert to fraction form
    320,491.60/480,559.93 = 131,084.98/x
  3. Step 3: Cross multiply
    320,491.60x = 480,559.93 × 131,084.98
  4. Step 4: Simplify right side
    320,491.60x = 62,994,190,061.87
  5. Step 5: Solve for x
    x = 62,994,190,061.87/320,491.60
  6. Step 6: Final answer
    x = 196,554.88

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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.