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Finding the Fourth Proportional to 274,763.40, 412,145.10 and 255,517.80

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Solution

The fourth proportional to 274,763.40, 412,145.10 and 255,517.80 is: 383,276.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,763.40 : 412,145.10 = 255,517.80 : x
  2. Step 2: Convert to fraction form
    274,763.40/412,145.10 = 255,517.80/x
  3. Step 3: Cross multiply
    274,763.40x = 412,145.10 × 255,517.80
  4. Step 4: Simplify right side
    274,763.40x = 105,310,409,232.78
  5. Step 5: Solve for x
    x = 105,310,409,232.78/274,763.40
  6. Step 6: Final answer
    x = 383,276.70

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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.