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Finding the Fourth Proportional to 789,658.54, 1,089,636.51 and 445,499.88

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Solution

The fourth proportional to 789,658.54, 1,089,636.51 and 445,499.88 is: 614,737.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,658.54 : 1,089,636.51 = 445,499.88 : x
  2. Step 2: Convert to fraction form
    789,658.54/1,089,636.51 = 445,499.88/x
  3. Step 3: Cross multiply
    789,658.54x = 1,089,636.51 × 445,499.88
  4. Step 4: Simplify right side
    789,658.54x = 485,432,934,448.62
  5. Step 5: Solve for x
    x = 485,432,934,448.62/789,658.54
  6. Step 6: Final answer
    x = 614,737.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.