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Finding the Fourth Proportional to 281,131.20, 421,696.80 and 254,012.40

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Solution

The fourth proportional to 281,131.20, 421,696.80 and 254,012.40 is: 381,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,131.20 : 421,696.80 = 254,012.40 : x
  2. Step 2: Convert to fraction form
    281,131.20/421,696.80 = 254,012.40/x
  3. Step 3: Cross multiply
    281,131.20x = 421,696.80 × 254,012.40
  4. Step 4: Simplify right side
    281,131.20x = 107,116,216,240.32
  5. Step 5: Solve for x
    x = 107,116,216,240.32/281,131.20
  6. Step 6: Final answer
    x = 381,018.60

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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.