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Finding the Fourth Proportional to 260,107.20, 389,504.70 and 207,619.20

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Solution

The fourth proportional to 260,107.20, 389,504.70 and 207,619.20 is: 310,905.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,107.20 : 389,504.70 = 207,619.20 : x
  2. Step 2: Convert to fraction form
    260,107.20/389,504.70 = 207,619.20/x
  3. Step 3: Cross multiply
    260,107.20x = 389,504.70 × 207,619.20
  4. Step 4: Simplify right side
    260,107.20x = 80,868,654,210.24
  5. Step 5: Solve for x
    x = 80,868,654,210.24/260,107.20
  6. Step 6: Final answer
    x = 310,905.10

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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.