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Finding the Fourth Proportional to 263,920.40, 395,621.40 and 130,821.20

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Solution

The fourth proportional to 263,920.40, 395,621.40 and 130,821.20 is: 196,103.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,920.40 : 395,621.40 = 130,821.20 : x
  2. Step 2: Convert to fraction form
    263,920.40/395,621.40 = 130,821.20/x
  3. Step 3: Cross multiply
    263,920.40x = 395,621.40 × 130,821.20
  4. Step 4: Simplify right side
    263,920.40x = 51,755,666,293.68
  5. Step 5: Solve for x
    x = 51,755,666,293.68/263,920.40
  6. Step 6: Final answer
    x = 196,103.32

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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.