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Finding the Fourth Proportional to 493,343.80, 740,015.70 and 419,860.60

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Solution

The fourth proportional to 493,343.80, 740,015.70 and 419,860.60 is: 629,790.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,343.80 : 740,015.70 = 419,860.60 : x
  2. Step 2: Convert to fraction form
    493,343.80/740,015.70 = 419,860.60/x
  3. Step 3: Cross multiply
    493,343.80x = 740,015.70 × 419,860.60
  4. Step 4: Simplify right side
    493,343.80x = 310,703,435,811.42
  5. Step 5: Solve for x
    x = 310,703,435,811.42/493,343.80
  6. Step 6: Final answer
    x = 629,790.90

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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.