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Finding the Fourth Proportional to 829,920.60, 1,244,662.20 and 261,300.60

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Solution

The fourth proportional to 829,920.60, 1,244,662.20 and 261,300.60 is: 391,882.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    829,920.60 : 1,244,662.20 = 261,300.60 : x
  2. Step 2: Convert to fraction form
    829,920.60/1,244,662.20 = 261,300.60/x
  3. Step 3: Cross multiply
    829,920.60x = 1,244,662.20 × 261,300.60
  4. Step 4: Simplify right side
    829,920.60x = 325,230,979,657.32
  5. Step 5: Solve for x
    x = 325,230,979,657.32/829,920.60
  6. Step 6: Final answer
    x = 391,882.04

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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.