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Finding the Fourth Proportional to 399,720.40, 599,503.80 and 119,246.80

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Solution

The fourth proportional to 399,720.40, 599,503.80 and 119,246.80 is: 178,847.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,720.40 : 599,503.80 = 119,246.80 : x
  2. Step 2: Convert to fraction form
    399,720.40/599,503.80 = 119,246.80/x
  3. Step 3: Cross multiply
    399,720.40x = 599,503.80 × 119,246.80
  4. Step 4: Simplify right side
    399,720.40x = 71,488,909,737.84
  5. Step 5: Solve for x
    x = 71,488,909,737.84/399,720.40
  6. Step 6: Final answer
    x = 178,847.29

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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.