Home / 820,138.20-1,230,207.30-459,939.30

Finding the Fourth Proportional to 820,138.20, 1,230,207.30 and 459,939.30

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Solution

The fourth proportional to 820,138.20, 1,230,207.30 and 459,939.30 is: 689,908.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,138.20 : 1,230,207.30 = 459,939.30 : x
  2. Step 2: Convert to fraction form
    820,138.20/1,230,207.30 = 459,939.30/x
  3. Step 3: Cross multiply
    820,138.20x = 1,230,207.30 × 459,939.30
  4. Step 4: Simplify right side
    820,138.20x = 565,820,684,416.89
  5. Step 5: Solve for x
    x = 565,820,684,416.89/820,138.20
  6. Step 6: Final answer
    x = 689,908.95

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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.