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Finding the Fourth Proportional to 328,998.60, 493,497.90 and 79,680.60

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Solution

The fourth proportional to 328,998.60, 493,497.90 and 79,680.60 is: 119,520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,998.60 : 493,497.90 = 79,680.60 : x
  2. Step 2: Convert to fraction form
    328,998.60/493,497.90 = 79,680.60/x
  3. Step 3: Cross multiply
    328,998.60x = 493,497.90 × 79,680.60
  4. Step 4: Simplify right side
    328,998.60x = 39,322,208,770.74
  5. Step 5: Solve for x
    x = 39,322,208,770.74/328,998.60
  6. Step 6: Final answer
    x = 119,520.90

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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.