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Finding the Fourth Proportional to 255,736.80, 383,605.20 and 131,320.80

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Solution

The fourth proportional to 255,736.80, 383,605.20 and 131,320.80 is: 196,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,736.80 : 383,605.20 = 131,320.80 : x
  2. Step 2: Convert to fraction form
    255,736.80/383,605.20 = 131,320.80/x
  3. Step 3: Cross multiply
    255,736.80x = 383,605.20 × 131,320.80
  4. Step 4: Simplify right side
    255,736.80x = 50,375,341,748.16
  5. Step 5: Solve for x
    x = 50,375,341,748.16/255,736.80
  6. Step 6: Final answer
    x = 196,981.20

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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.