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Finding the Fourth Proportional to 439,680.80, 659,521.20 and 399,002.60

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Solution

The fourth proportional to 439,680.80, 659,521.20 and 399,002.60 is: 598,503.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,680.80 : 659,521.20 = 399,002.60 : x
  2. Step 2: Convert to fraction form
    439,680.80/659,521.20 = 399,002.60/x
  3. Step 3: Cross multiply
    439,680.80x = 659,521.20 × 399,002.60
  4. Step 4: Simplify right side
    439,680.80x = 263,150,673,555.12
  5. Step 5: Solve for x
    x = 263,150,673,555.12/439,680.80
  6. Step 6: Final answer
    x = 598,503.90

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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.